Paul R. Proefrock

Follow

Person

Lexington, KY, US

People

Patents Grantslast 30 patents

Information Patent Grant
Padlock having knuckle type anti-wedge-attack structure
- Patent number 4,107,965
- Issue date Aug 22, 1978
- Sargent & Greenleaf, Inc.
- James Clayton Miller
- E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES
Information Patent Grant
Padlock having wedge device for resisting destructive wedge attack
- Patent number 4,104,894
- Issue date Aug 8, 1978
- Sargent & Greenleaf, Inc.
- James C. Miller
- E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES
Information Patent Grant
Enshrouding lock device for paired locking bars and the like
- Patent number 4,102,161
- Issue date Jul 25, 1978
- Sargent & Greenleaf, Inc.
- Paul R. Proefrock
- E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES
Information Patent Grant
Rotary disc tumbler cylinder lock
- Patent number 4,083,212
- Issue date Apr 11, 1978
- Sargent & Greenleaf, Inc.
- Paul R. Proefrock
- E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES