Robert Mayer

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Pleasanton, CA, US

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Patents Grantslast 30 patents

Information Patent Grant
Anti-piggybacking: sensor system for security door to detect two in...
- Patent number 5,201,906
- Issue date Apr 13, 1993
- Schwarz; Milan
- Milan Schwarz
- E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES
Information Patent Grant
Security door with improved sensor for detecting unauthorized passage
- Patent number 5,097,454
- Issue date Mar 17, 1992
- Schwarz; Milan
- Milan Schwarz
- E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES
Information Patent Grant
Security door with improved sensor for detecting unauthorized passage
- Patent number 5,012,455
- Issue date Apr 30, 1991
- Revolving Door Control, Inc.
- Milan Schwarz
- E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES
Information Patent Grant
Interference avoidance device for use in a sensor system
- Patent number 4,845,682
- Issue date Jul 4, 1989
- Electro Corporation
- James M. Boozer
- G05 - CONTROLLING REGULATING