David D. Koenig

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Oro Valley, AZ, US

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Patents Grantslast 30 patents

Information Patent Grant
Door latch with privacy feature
- Patent number 5,433,497
- Issue date Jul 18, 1995
- Masco Building Products Corporation
- David D. Koenig
- E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES
Information Patent Grant
Retaining ring removal and installation tool
- Patent number 5,301,407
- Issue date Apr 12, 1994
- Masco Building Products Corp.
- David D. Koenig
- B25 - HAND TOOLS PORTABLE POWER-DRIVEN TOOLS MANIPULATORS