Pocket Watch Database
E. Howard Watch Co. (Keystone)
Pocket Watch Patents
The following gallery contains patents that were issued or assigned to E. Howard Watch Co. (Keystone) or individuals known to be associated with the company at the time. Not all designs were fully implemented into production.
Watch Stem Wind & Set
| Patent Number: | 781263 |
| Description: | Watch Stem Wind & Set |
| Inventor: | Olof Anderson |
| Patent Date: | Jan 31, 1905 |
| Registration Type: | Patent |
Watch Balance
| Patent Number: | 788399 |
| Description: | Watch Balance |
| Inventor: | Joseph Alexander Freund |
| Patent Date: | Apr 25, 1905 |
| Registration Type: | Patent |
Watch Stem Wind Mech
| Patent Number: | 796162 |
| Description: | Watch Stem Wind Mech |
| Inventor: | Ryland L. Taft |
| Assignee: | E Howard Watch Co |
| Patent Date: | Aug 1, 1905 |
| Registration Type: | Patent |
| Sample Image: |  |
Watch Barrel
| Patent Number: | 886387 |
| Description: | Watch Barrel |
| Inventor: | Walter B. Mehl |
| Assignee: | Howard Watch Co |
| Patent Date: | May 5, 1908 |
| Registration Type: | Patent |
| Sample Image: |  |
Machine Staff Lathe
| Patent Number: | 889386 |
| Description: | Machine Staff Lathe |
| Inventor: | Walter B. Mehl |
| Assignee: | E Howard Watch Co |
| Patent Date: | Jun 2, 1908 |
| Registration Type: | Patent |
Watch Movement
| Patent Number: | 900183 |
| Description: | Watch Movement |
| Inventor: | Walter B. Mehl |
| Assignee: | E Howard Watch Co |
| Patent Date: | Oct 6, 1908 |
| Registration Type: | Patent |
Watch Case
| Patent Number: | 922013 |
| Description: | Watch Case |
| Inventor: | Walter B. Mehl |
| Assignee: | E Howard Watch Co |
| Patent Date: | May 18, 1909 |
| Registration Type: | Patent |
Watch Stem Wind & Set
| Patent Number: | 946906 |
| Description: | Watch Stem Wind & Set |
| Inventor: | William B. Ebelhare Walter B. Mehl |
| Assignee: | Philadelphia Watch Case Co |
| Patent Date: | Jan 18, 1910 |
| Registration Type: | Patent |
Watch Movement Click
| Patent Number: | 951106 |
| Description: | Watch Movement Click |
| Inventor: | William Henry Ebelhare |
| Assignee: | Philadelphia Watch Case Co |
| Patent Date: | Mar 8, 1910 |
| Registration Type: | Patent |
Watch Movement Ratchet Mech
| Patent Number: | 971496 |
| Description: | Watch Movement Ratchet Mech |
| Inventor: | William Henry Ebelhare |
| Assignee: | Keystone Watch Case Co |
| Patent Date: | Sep 27, 1910 |
| Registration Type: | Patent |
| Sample Image: |  |
Watch Movement Ratchet Mech
| Patent Number: | 971500 |
| Description: | Watch Movement Ratchet Mech |
| Inventor: | Howard Metzler Groff |
| Assignee: | Keystone Watch Case Co |
| Patent Date: | Sep 27, 1910 |
| Registration Type: | Patent |
Watch Movement Ratchet Mech
| Patent Number: | 977286 |
| Description: | Watch Movement Ratchet Mech |
| Inventor: | William Henry Ebelhare |
| Assignee: | Keystone Watch Case Co |
| Patent Date: | Nov 29, 1910 |
| Registration Type: | Patent |
Watch Movement
| Patent Number: | 977320 |
| Description: | Watch Movement |
| Inventor: | Walter B. Mehl |
| Assignee: | Keystone Watch Case Co |
| Patent Date: | Nov 29, 1910 |
| Registration Type: | Patent |
Watch Movement
| Patent Number: | 977321 |
| Description: | Watch Movement |
| Inventor: | Walter B. Mehl |
| Assignee: | Keystone Watch Case Co |
| Patent Date: | Nov 29, 1910 |
| Registration Type: | Patent |
Watch Movement End Stone Cap
| Patent Number: | 978612 |
| Description: | Watch Movement End Stone Cap |
| Inventor: | Walter B. Mehl |
| Assignee: | Keystone Watch Case Co |
| Patent Date: | Dec 13, 1910 |
| Registration Type: | Patent |
| Sample Image: |  |
Watch Barrel
| Patent Number: | 978613 |
| Description: | Watch Barrel |
| Inventor: | Walter Bird Mehl |
| Assignee: | Keystone Watch Case Co |
| Patent Date: | Dec 13, 1910 |
| Registration Type: | Patent |
Watch Movement Pallet End Stone Cap
| Patent Number: | 981667 |
| Description: | Watch Movement Pallet End Stone Cap |
| Inventor: | Walter B. Mehl |
| Assignee: | Keystone Watch Case Co |
| Patent Date: | Jan 17, 1911 |
| Registration Type: | Patent |
| Sample Image: |  |
Watch Wind Indicator
| Patent Number: | 992118 |
| Description: | Watch Wind Indicator |
| Inventor: | William Henry Ebelhare |
| Assignee: | Keystone Watch Case Co |
| Patent Date: | May 9, 1911 |
| Registration Type: | Patent |
Watch Stem Wind & Set
| Patent Number: | 1013896 |
| Description: | Watch Stem Wind & Set |
| Inventor: | Earle Sloan Perry |
| Assignee: | Keystone Watch Case Co |
| Patent Date: | Jan 9, 1912 |
| Registration Type: | Patent |
Watch Bridge Plate -edward Howard-
| Patent Number: | D42574 |
| Description: | Watch Bridge Plate -edward Howard- |
| Inventor: | Joseph A. Freund William H. Ebelhare |
| Assignee: | Keystone Watch Case Co |
| Patent Date: | Jun 4, 1912 |
| Registration Type: | Patent |
| Sample Image: |  |
Watch Stem Wind & Set
| Patent Number: | 1029116 |
| Description: | Watch Stem Wind & Set |
| Inventor: | Joseph A. Freund |
| Assignee: | Keystone Watch Case Co |
| Patent Date: | Jun 11, 1912 |
| Registration Type: | Patent |
| Sample Image: |  |
Watch Movement
| Patent Number: | 1041335 |
| Description: | Watch Movement |
| Inventor: | Granville Nutting |
| Assignee: | Keystone Watch Case Co |
| Patent Date: | Oct 15, 1912 |
| Registration Type: | Patent |
Banking Pin
| Patent Number: | 1062645 |
| Description: | Banking Pin |
| Inventor: | Joseph A. Freund |
| Assignee: | Keystone Watch Case Co |
| Patent Date: | May 27, 1913 |
| Registration Type: | Patent |
Watch Movement
| Patent Number: | 1063251 |
| Description: | Watch Movement |
| Inventor: | Joseph A. Freund |
| Assignee: | Keystone Watch Case Co |
| Patent Date: | Jun 3, 1913 |
| Registration Type: | Patent |
Watch Movement
| Patent Number: | 1084215 |
| Description: | Watch Movement |
| Inventor: | Erik A. Lundvall |
| Assignee: | Keystone Watch Case Co |
| Patent Date: | Jan 13, 1914 |
| Registration Type: | Patent |
Watch Display Box
| Patent Number: | 1346591 |
| Description: | Watch Display Box |
| Inventor: | Wilbur C. Cook |
| Assignee: | Keystone Watch Case Co |
| Patent Date: | Jul 13, 1920 |
| Registration Type: | Patent |
Device Stem Wind & Set
| Patent Number: | 1378408 |
| Description: | Device Stem Wind & Set |
| Inventor: | Joseph A. Freund |
| Assignee: | Keystone Watch Case Co |
| Patent Date: | May 17, 1921 |
| Registration Type: | Patent |
Watch Thin Movement
| Patent Number: | 1392006 |
| Description: | Watch Thin Movement |
| Inventor: | Joseph A. Freund |
| Patent Date: | Sep 27, 1921 |
| Registration Type: | Patent |
Watch Plate Mfg
| Patent Number: | 1392007 |
| Description: | Watch Plate Mfg |
| Inventor: | Joseph A. Freund |
| Patent Date: | Sep 27, 1921 |
| Registration Type: | Patent |
Watch Wind Mech
| Patent Number: | 1467427 |
| Description: | Watch Wind Mech |
| Inventor: | Joseph A. Freund |
| Assignee: | Keystone Watch Case Co |
| Patent Date: | Sep 11, 1923 |
| Registration Type: | Patent |
Watch Wind Device
| Patent Number: | 1499609 |
| Description: | Watch Wind Device |
| Inventor: | Joseph A. Freund |
| Assignee: | Keystone Watch Case Co |
| Patent Date: | Jul 1, 1924 |
| Registration Type: | Patent |