Daniel R. Bischoff

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Grand Rapids, MI, US

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Patents Grantslast 30 patents

Information Patent Grant
Drawer interlock to non-interlock conversion device
- Patent number 5,997,114
- Issue date Dec 7, 1999
- Steelcase Development Inc.
- Daniel Ralph Bischoff
- E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES
Information Patent Grant
Drawer interlock to non-interlock conversion device
- Patent number 5,931,548
- Issue date Aug 3, 1999
- STEELCASE INC.
- Daniel Ralph Bischoff
- E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES
Information Patent Grant
Double cylinder lock with key retention
- Patent number 4,228,669
- Issue date Oct 21, 1980
- Kysor Industrial Corporation
- Daniel R. Bischoff
- E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES