Harold Halvorson Jr.

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Grand Rapids, MI, US

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Patents Grantslast 30 patents

Information Patent Grant
Storage cabinet with handle operated door
- Patent number 6,227,635
- Issue date May 8, 2001
- Steelcase Developments Inc.
- David S. Teppo
- E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES
Information Patent Grant
Overhead structures for wall system
- Patent number 6,158,179
- Issue date Dec 12, 2000
- Steelcase Development Inc.
- Anne C. Ackerly
- E04 - BUILDING
Information Patent Grant
Clear wall panel system
- Patent number 6,141,925
- Issue date Nov 7, 2000
- Steelcase Development Inc.
- Harold Halvorson
- E04 - BUILDING
Information Patent Grant
Adjustable door and doorway construction
- Patent number 6,058,665
- Issue date May 9, 2000
- Steelcase Development Inc.
- Harold Halvorson
- E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES