Pocket Watch Database
Keystone Watch Case Co.
Pocket Watch Patents
The following gallery contains patents that were issued or assigned to Keystone Watch Case Co. or individuals known to be associated with the company at the time. Not all designs were fully implemented into production.
Watch Case Die
| Patent Number: | 300109 |
| Description: | Watch Case Die |
| Inventor: | Theodore Mueller |
| Assignee: | Thorpe Charles N |
| Patent Date: | Jun 10, 1884 |
| Registration Type: | Patent |
Watch Pendant Stem For
| Patent Number: | 345055 |
| Description: | Watch Pendant Stem For |
| Inventor: | Edward F. Heffernan |
| Assignee: | Keystone Watch Case Co |
| Patent Date: | Jul 6, 1886 |
| Registration Type: | Patent |
Watch Case Spring
| Patent Number: | 345226 |
| Description: | Watch Case Spring |
| Inventor: | William Fowler |
| Assignee: | Keystone Watch Case Co |
| Patent Date: | Jul 6, 1886 |
| Registration Type: | Patent |
Watch Case Spring
| Patent Number: | 345266 |
| Description: | Watch Case Spring |
| Inventor: | W. Fowler |
| Assignee: | Keystone Watch Case Co |
| Patent Date: | Jul 6, 1886 |
| Registration Type: | Patent |
Watch Case Ornamentation
| Patent Number: | 373011 |
| Description: | Watch Case Ornamentation |
| Inventor: | Edward C. Chappatte |
| Assignee: | Keystone Watch Case Co |
| Patent Date: | Nov 8, 1887 |
| Registration Type: | Patent |
Watch Case
| Patent Number: | 373723 |
| Description: | Watch Case |
| Inventor: | Edward C. Chappatte |
| Assignee: | Keystone Watch Case Co |
| Patent Date: | Nov 22, 1887 |
| Registration Type: | Patent |
Watch Case With Photograph
| Patent Number: | 384346 |
| Description: | Watch Case With Photograph |
| Inventor: | Edward C. Chappatte |
| Assignee: | Keystone Watch Case Co |
| Patent Date: | Jun 12, 1888 |
| Registration Type: | Patent |
Watch Case Spring
| Patent Number: | 409739 |
| Description: | Watch Case Spring |
| Inventor: | James D. Ewing |
| Assignee: | Keystone Watch Case Co |
| Patent Date: | Aug 27, 1889 |
| Registration Type: | Patent |
Watch Case Spring
| Patent Number: | 409745 |
| Description: | Watch Case Spring |
| Inventor: | Harry R. Gaul |
| Assignee: | Keystone Watch Case Co |
| Patent Date: | Aug 27, 1889 |
| Registration Type: | Patent |
Watch Case Bow
| Patent Number: | 414793 |
| Description: | Watch Case Bow |
| Inventor: | Edward C. Chappatte |
| Assignee: | Keystone Watch Case Co |
| Patent Date: | Nov 12, 1889 |
| Registration Type: | Patent |
Watch Case Bow
| Patent Number: | 414795 |
| Description: | Watch Case Bow |
| Inventor: | E. C. Chappatte |
| Assignee: | Keystone Watch Case Co |
| Patent Date: | Nov 12, 1889 |
| Registration Type: | Patent |
Watch Case Spring
| Patent Number: | 414802 |
| Description: | Watch Case Spring |
| Inventor: | James D. Ewing |
| Assignee: | Keystone Watch Case Co |
| Patent Date: | Nov 12, 1889 |
| Registration Type: | Patent |
Watch Bow Fasten
| Patent Number: | 414828 |
| Description: | Watch Bow Fasten |
| Inventor: | Fred L. Turner |
| Assignee: | Keystone Watch Case Co |
| Patent Date: | Nov 12, 1889 |
| Registration Type: | Patent |
Watch Case Spring
| Patent Number: | 415669 |
| Description: | Watch Case Spring |
| Inventor: | Harry R. Gaul |
| Assignee: | Keystone Watch Case Co |
| Patent Date: | Nov 19, 1889 |
| Registration Type: | Patent |
Watch Case
| Patent Number: | 415678 |
| Description: | Watch Case |
| Inventor: | Fritz Mink |
| Assignee: | Keystone Watch Case Co |
| Patent Date: | Nov 19, 1889 |
| Registration Type: | Patent |
| Sample Image: |  |
Watch Case
| Patent Number: | 424491 |
| Description: | Watch Case |
| Inventor: | Fritz Mink |
| Assignee: | Keystone Watch Case Co |
| Patent Date: | Apr 1, 1890 |
| Registration Type: | Patent |
Watch Bow Fasten
| Patent Number: | 433532 |
| Description: | Watch Bow Fasten |
| Inventor: | Fritz Mink |
| Assignee: | Keystone Watch Case Co |
| Patent Date: | Aug 5, 1890 |
| Registration Type: | Patent |
Watch Bow Fasten
| Patent Number: | 438094 |
| Description: | Watch Bow Fasten |
| Inventor: | Edward C. Chappatte |
| Assignee: | Keystone Watch Case Co |
| Patent Date: | Oct 7, 1890 |
| Registration Type: | Patent |
Watch Bow Fasten
| Patent Number: | 439414 |
| Description: | Watch Bow Fasten |
| Inventor: | Fritz Mink |
| Assignee: | Keystone Watch Case Co |
| Patent Date: | Oct 28, 1890 |
| Registration Type: | Patent |
Watch Bow Fasten
| Patent Number: | 441172 |
| Description: | Watch Bow Fasten |
| Inventor: | Emil Klahn |
| Assignee: | Keystone Watch Case Co |
| Patent Date: | Nov 25, 1890 |
| Registration Type: | Patent |
Watch Stop
| Patent Number: | 448549 |
| Description: | Watch Stop |
| Inventor: | Charles Schlatter |
| Patent Date: | Mar 17, 1891 |
| Registration Type: | Patent |
Watch Bow Fasten
| Patent Number: | 449255 |
| Description: | Watch Bow Fasten |
| Inventor: | Emil Klahn |
| Assignee: | Keystone Watch Case Co |
| Patent Date: | Mar 31, 1891 |
| Registration Type: | Patent |
Watch Pendant
| Patent Number: | 450579 |
| Description: | Watch Pendant |
| Inventor: | Frank G. Faxon |
| Assignee: | Keystone Watch Case Co |
| Patent Date: | Apr 14, 1891 |
| Registration Type: | Patent |
Watch Bow Fasten
| Patent Number: | 453843 |
| Description: | Watch Bow Fasten |
| Inventor: | Emil Klahn |
| Assignee: | Keystone Watch Case Co |
| Patent Date: | Jun 9, 1891 |
| Registration Type: | Patent |
Watch Bow Fasten
| Patent Number: | 454827 |
| Description: | Watch Bow Fasten |
| Inventor: | Fritz Mink |
| Assignee: | Keystone Watch Case Co |
| Patent Date: | Jun 23, 1891 |
| Registration Type: | Patent |
Watch Case
| Patent Number: | 455231 |
| Description: | Watch Case |
| Inventor: | Nicholas Moore |
| Assignee: | Keystone Watch Case Co |
| Patent Date: | Jun 30, 1891 |
| Registration Type: | Patent |
Watch Bow
| Patent Number: | 456899 |
| Description: | Watch Bow |
| Inventor: | Fritz Mink |
| Assignee: | Keystone Watch Case Co |
| Patent Date: | Jul 28, 1891 |
| Registration Type: | Patent |
Watch Bow Fasten
| Patent Number: | 456900 |
| Description: | Watch Bow Fasten |
| Inventor: | Fritz Mink |
| Assignee: | Keystone Watch Case Co |
| Patent Date: | Jul 28, 1891 |
| Registration Type: | Patent |
Watch Bow Fasten
| Patent Number: | 456901 |
| Description: | Watch Bow Fasten |
| Inventor: | Fritz Mink |
| Assignee: | Keystone Watch Case Co |
| Patent Date: | Jul 28, 1891 |
| Registration Type: | Patent |
Watch Bow Fasten
| Patent Number: | 456902 |
| Description: | Watch Bow Fasten |
| Inventor: | Fritz Mink |
| Assignee: | Keystone Watch Case Co |
| Patent Date: | Jul 28, 1891 |
| Registration Type: | Patent |
Watch Bow Fasten
| Patent Number: | 459133 |
| Description: | Watch Bow Fasten |
| Inventor: | Edward C. Chappatte |
| Assignee: | Keystone Watch Case Co |
| Patent Date: | Sep 8, 1891 |
| Registration Type: | Patent |
Watch Bow Fasten
| Patent Number: | 460074 |
| Description: | Watch Bow Fasten |
| Inventor: | Fritz Mink |
| Assignee: | Keystone Watch Case Co |
| Patent Date: | Sep 22, 1891 |
| Registration Type: | Patent |
Watch Bow Fasten
| Patent Number: | 460872 |
| Description: | Watch Bow Fasten |
| Inventor: | John J. Hogan |
| Assignee: | Keystone Watch Case Co |
| Patent Date: | Oct 6, 1891 |
| Registration Type: | Patent |
Watch Bow Fasten
| Patent Number: | 460879 |
| Description: | Watch Bow Fasten |
| Inventor: | Fritz Mink |
| Assignee: | Keystone Watch Case Co |
| Patent Date: | Oct 6, 1891 |
| Registration Type: | Patent |
Watch Bow Fasten
| Patent Number: | 461798 |
| Description: | Watch Bow Fasten |
| Inventor: | Fritz Mink |
| Assignee: | Keystone Watch Case Co |
| Patent Date: | Oct 20, 1891 |
| Registration Type: | Patent |
Machine Watch Case Hinge Flat
| Patent Number: | 462803 |
| Description: | Machine Watch Case Hinge Flat |
| Inventor: | Fritz Mink |
| Assignee: | Keystone Watch Case Co |
| Patent Date: | Nov 10, 1891 |
| Registration Type: | Patent |
Watch Bow Fasten
| Patent Number: | 464743 |
| Description: | Watch Bow Fasten |
| Inventor: | Olof Johanson |
| Assignee: | Keystone Watch Case Co |
| Patent Date: | Dec 8, 1891 |
| Registration Type: | Patent |
Watch Bow Fasten
| Patent Number: | 466278 |
| Description: | Watch Bow Fasten |
| Inventor: | Fritz Mink |
| Assignee: | Keystone Watch Case Co |
| Patent Date: | Dec 29, 1891 |
| Registration Type: | Patent |
Machine Watch Case Ornament
| Patent Number: | 468748 |
| Description: | Machine Watch Case Ornament |
| Inventor: | Fritz Mink |
| Assignee: | Keystone Watch Case Co |
| Patent Date: | Feb 9, 1892 |
| Registration Type: | Patent |
Watch Case Cover Or Bezel
| Patent Number: | 468749 |
| Description: | Watch Case Cover Or Bezel |
| Inventor: | Fritz Mink |
| Assignee: | Keystone Watch Case Co |
| Patent Date: | Feb 9, 1892 |
| Registration Type: | Patent |
Watch Bow Fasten
| Patent Number: | 468806 |
| Description: | Watch Bow Fasten |
| Inventor: | Olof Johanson |
| Assignee: | Keystone Watch Case Co |
| Patent Date: | Feb 16, 1892 |
| Registration Type: | Patent |
Watch Bow Fasten
| Patent Number: | 472764 |
| Description: | Watch Bow Fasten |
| Inventor: | Fritz Mink |
| Assignee: | Keystone Watch Case Co |
| Patent Date: | Apr 12, 1892 |
| Registration Type: | Patent |
Watch Case
| Patent Number: | 492629 |
| Description: | Watch Case |
| Inventor: | Fritz Mink |
| Assignee: | Keystone Watch Case Co |
| Patent Date: | Feb 28, 1893 |
| Registration Type: | Patent |
Watch Bow Fasten
| Patent Number: | 496830 |
| Description: | Watch Bow Fasten |
| Inventor: | Rudolph M. Hunter |
| Assignee: | Keystone Watch Case Co |
| Patent Date: | May 2, 1893 |
| Registration Type: | Patent |
Watch Bow Fasten
| Patent Number: | 496943 |
| Description: | Watch Bow Fasten |
| Inventor: | Fritz Mink |
| Assignee: | Keystone Watch Case Co |
| Patent Date: | May 9, 1893 |
| Registration Type: | Patent |
Watch Bow Fasten
| Patent Number: | 500817 |
| Description: | Watch Bow Fasten |
| Inventor: | Louis Platnauer |
| Assignee: | Keystone Watch Case Co |
| Patent Date: | Jul 4, 1893 |
| Registration Type: | Patent |
Watch Bow Fasten
| Patent Number: | 501210 |
| Description: | Watch Bow Fasten |
| Inventor: | Fritz Mink |
| Assignee: | Keystone Watch Case Co |
| Patent Date: | Jul 11, 1893 |
| Registration Type: | Patent |
Watch Case Pendant
| Patent Number: | 505474 |
| Description: | Watch Case Pendant |
| Inventor: | Fritz Mink |
| Assignee: | Keystone Watch Case Co |
| Patent Date: | Sep 26, 1893 |
| Registration Type: | Patent |
Watch Case
| Patent Number: | 511055 |
| Description: | Watch Case |
| Inventor: | Fritz Mink |
| Assignee: | Keystone Watch Case Co |
| Patent Date: | Dec 19, 1893 |
| Registration Type: | Patent |
Watch Bow Fasten
| Patent Number: | 540739 |
| Description: | Watch Bow Fasten |
| Inventor: | Rudolph M. Hunter |
| Assignee: | Keystone Watch Case Co |
| Patent Date: | Jun 11, 1895 |
| Registration Type: | Patent |
Watch Bow Fasten
| Patent Number: | 544039 |
| Description: | Watch Bow Fasten |
| Inventor: | Ernest Howard Hunter |
| Assignee: | Keystone Watch Case Co |
| Patent Date: | Aug 6, 1895 |
| Registration Type: | Patent |
Watch Bow Fasten
| Patent Number: | 553341 |
| Description: | Watch Bow Fasten |
| Inventor: | Ernest Howard Hunter |
| Assignee: | Keystone Watch Case Co |
| Patent Date: | Jan 21, 1896 |
| Registration Type: | Patent |
Watch Bow Fasten
| Patent Number: | 553589 |
| Description: | Watch Bow Fasten |
| Inventor: | Fritz Mink |
| Assignee: | Keystone Watch Case Co |
| Patent Date: | Jan 28, 1896 |
| Registration Type: | Patent |
Watch Case Spring
| Patent Number: | 560812 |
| Description: | Watch Case Spring |
| Inventor: | Fritz Mink |
| Assignee: | Keystone Watch Case Co |
| Patent Date: | May 26, 1896 |
| Registration Type: | Patent |
Watch Bow Fasten
| Patent Number: | 560813 |
| Description: | Watch Bow Fasten |
| Inventor: | Fritz Mink |
| Assignee: | Keystone Watch Case Co |
| Patent Date: | May 26, 1896 |
| Registration Type: | Patent |
Watch Case Pendant Mech For Make
| Patent Number: | 561942 |
| Description: | Watch Case Pendant Mech For Make |
| Inventor: | Nicholas Moore Fritz Mink |
| Assignee: | Keystone Watch Case Co |
| Patent Date: | Jun 9, 1896 |
| Registration Type: | Patent |
Tool Watch Case Chuck
| Patent Number: | 568985 |
| Description: | Tool Watch Case Chuck |
| Inventor: | Fritz Mink |
| Assignee: | Keystone Watch Case Co |
| Patent Date: | Oct 6, 1896 |
| Registration Type: | Patent |
Watch Case Pendant
| Patent Number: | 579996 |
| Description: | Watch Case Pendant |
| Inventor: | Fritz Mink |
| Assignee: | Keystone Watch Case Co |
| Patent Date: | Apr 6, 1897 |
| Registration Type: | Patent |
Watch Case Bow
| Patent Number: | 971053 |
| Description: | Watch Case Bow |
| Inventor: | Bernard Levy |
| Assignee: | Keystone Watch Case Co |
| Patent Date: | Sep 27, 1910 |
| Registration Type: | Patent |
Watch Pendant Bow
| Patent Number: | D41552 |
| Description: | Watch Pendant Bow |
| Inventor: | Fritz Mink |
| Assignee: | Keystone Watch Case Co |
| Patent Date: | Jul 11, 1911 |
| Registration Type: | Patent |
Watch Case
| Patent Number: | 998792 |
| Description: | Watch Case |
| Inventor: | Fritz Mink |
| Assignee: | Keystone Watch Case Co |
| Patent Date: | Jul 25, 1911 |
| Registration Type: | Patent |
Watch Pendant
| Patent Number: | 1180594 |
| Description: | Watch Pendant |
| Inventor: | William B. Clark Bern Levy |
| Assignee: | Keystone Watch Case Co |
| Patent Date: | Apr 25, 1916 |
| Registration Type: | Patent |
Watch Case
| Patent Number: | D50910 |
| Description: | Watch Case |
| Inventor: | Frederick E. Hyatt |
| Assignee: | Keystone Watch Case Co |
| Patent Date: | Jun 12, 1917 |
| Registration Type: | Patent |
Watch Case
| Patent Number: | D50911 |
| Description: | Watch Case |
| Inventor: | Frederick E. Hyatt |
| Assignee: | Keystone Watch Case Co |
| Patent Date: | Jun 12, 1917 |
| Registration Type: | Patent |
Watch Case
| Patent Number: | D50944 |
| Description: | Watch Case |
| Inventor: | Frederick E. Hyatt |
| Assignee: | Keystone Watch Case Co |
| Patent Date: | Jun 19, 1917 |
| Registration Type: | Patent |
Watch Case
| Patent Number: | D50945 |
| Description: | Watch Case |
| Inventor: | Frederick Eden Hyatt |
| Assignee: | Keystone Watch Case Co |
| Patent Date: | Jun 19, 1917 |
| Registration Type: | Patent |
Watch Case
| Patent Number: | D63561 |
| Description: | Watch Case |
| Inventor: | Victor Ritschard |
| Assignee: | Keystone Watch Case Co |
| Patent Date: | Dec 18, 1923 |
| Registration Type: | Patent |
Watch Case Band Attach For Wrist
| Patent Number: | 1498070 |
| Description: | Watch Case Band Attach For Wrist |
| Inventor: | August Beucke |
| Assignee: | Keystone Watch Case Co |
| Patent Date: | Jun 17, 1924 |
| Registration Type: | Patent |
Remove Bar Hinge Strap End
| Patent Number: | 1498109 |
| Description: | Remove Bar Hinge Strap End |
| Inventor: | George R. Mulholland |
| Assignee: | Keystone Watch Case Co |
| Patent Date: | Jun 17, 1924 |
| Registration Type: | Patent |
Watch Bow & Crown
| Patent Number: | D67694 |
| Description: | Watch Bow & Crown |
| Inventor: | Herbert K. Foster |
| Assignee: | Keystone Watch Case Co |
| Patent Date: | Jun 30, 1925 |
| Registration Type: | Patent |
Watch Bow & Crown
| Patent Number: | D67695 |
| Description: | Watch Bow & Crown |
| Inventor: | Herbert K. Foster |
| Assignee: | Keystone Watch Case Co |
| Patent Date: | Jun 30, 1925 |
| Registration Type: | Patent |
Watch Case Bow
| Patent Number: | D68117 |
| Description: | Watch Case Bow |
| Inventor: | Paul Victor Ritschard |
| Assignee: | Keystone Watch Case Co |
| Patent Date: | Sep 1, 1925 |
| Registration Type: | Patent |
Watch Case Construction
| Patent Number: | 1610276 |
| Description: | Watch Case Construction |
| Inventor: | Herbert K. Foster |
| Assignee: | Keystone Watch Case Co |
| Patent Date: | Dec 14, 1926 |
| Registration Type: | Patent |
Watch Case
| Patent Number: | D72024 |
| Description: | Watch Case |
| Inventor: | Bernard Levy |
| Assignee: | Keystone Watch Case Co |
| Patent Date: | Feb 15, 1927 |
| Registration Type: | Patent |
Watch Wrist Case
| Patent Number: | D75931 |
| Description: | Watch Wrist Case |
| Inventor: | Victor Ritschard |
| Assignee: | Keystone Watch Case Corp |
| Patent Date: | Jul 31, 1928 |
| Registration Type: | Patent |