William A. P. Lawrence

Follow

Person

Simi Valley, CA, US

People

Patents Grantslast 30 patents

Information Patent Grant
Self-adjusting control valve for elevators
- Patent number 4,694,935
- Issue date Sep 22, 1987
- Cemco, Inc.
- William A. P. Lawrence
- B66 - HOISTING LIFTING HAULING
Information Patent Grant
Pressure and temperature compensating hydraulic valve
- Patent number RE30902
- Issue date Apr 13, 1982
- Elevator Equipment Co.
- William A. P. Lawrence
- 137 - Fluid handling
Information Patent Grant
Pressure and temperature compensating hydraulic valve
- Patent number 4,194,534
- Issue date Mar 25, 1980
- Elevator Equipment Co.
- William A. P. Lawrence
- B66 - HOISTING LIFTING HAULING
Information Patent Grant
Unitary elevator up level control valve
- Patent number 4,011,888
- Issue date Mar 15, 1977
- Elevator Equipment Co.
- Robert J. Whelchel
- B66 - HOISTING LIFTING HAULING