Fritz H. Johansson

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San Jose, CA, US

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Patents Grantslast 30 patents

Information Patent Grant
Electronic combination lock
- Patent number 7,712,341
- Issue date May 11, 2010
- Fritz Hugo Johansson
- E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES
Information Patent Grant
Hafe-duplex two-wire DC power-line communication system
- Patent number 5,986,539
- Issue date Nov 16, 1999
- Ultracision, Inc.
- Fritz H. Johansson
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Apparatus and method for device control using a two conductor power...
- Patent number 4,788,527
- Issue date Nov 29, 1988
- Fritz H. Johansson
- G08 - SIGNALLING
Information Patent Grant
Electronic digital combination lock
- Patent number 4,770,012
- Issue date Sep 13, 1988
- Intelock Corporation
- Fritz H. Johansson
- E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES
Information Patent Grant
Electronic digital combination lock
- Patent number 4,457,148
- Issue date Jul 3, 1984
- Fritz H. Johansson
- E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES

Patents Applicationslast 30 patents

Information Patent Application
Electronic Combination Lock
- Publication number 20080060393
- Publication date Mar 13, 2008
- Fritz Hugo Johansson
- E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES