Richens; Robert H.
Patent Applications and Registrations
Patent applications and USPTO patent grants for Richens; Robert H..The latest application filed is for "key machine drive".
- Richens; Robert H. - Macedonia OH
- Richens; Robert H. - Bedford Heights OH
- Richens; Robert H. - Leominster MA
| Patent | Date |
|---|---|
| Key Machine Drive Grant 3,792,639 - Richens , et al. February 19, 1 | 1974-02-19 |
| Key Cutter Grant 3,722,341 - Hungerford, Jr. , et al. March 27, 1 | 1973-03-27 |
| Key Cutting Machine Grant 3,675,536 - Hungerford, Jr. , et al. July 11, 1 | 1972-07-11 |
| Key-positioning Vise Assembly For Automatic Key Cutter Grant 3,602,092 - Richens August 31, 1 | 1971-08-31 |
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