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Christopher T. Sandberg
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Owatonna, MN, US
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Patents Grants
last 30 patents
Information
Patent Grant
Window operator
Patent number
4,938,086
Issue date
Jul 3, 1990
Truht Incorporated
Douglas A. Nolte
E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES
Information
Patent Grant
Method of assembling a window operator
Patent number
4,843,703
Issue date
Jul 4, 1989
Truth Incorporated
Douglas A. Nolte
E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES
Information
Patent Grant
Snap stud
Patent number
RE32846
Issue date
Jan 31, 1989
Truth Incorporated
Christopher T. Sandberg
016 - Miscellaneous hardware
Information
Patent Grant
Snap stud
Patent number
4,593,431
Issue date
Jun 10, 1986
Truth Incorporated
Christopher T. Sandberg
E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES
Information
Patent Grant
Retainer bearing and bearing assembly for a window operator and ass...
Patent number
4,505,601
Issue date
Mar 19, 1985
Truth Incorporated
Christopher T. Sandberg
E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES
Information
Patent Grant
Self-locking threaded bearing and bearing assembly and method of ma...
Patent number
4,445,794
Issue date
May 1, 1984
Truth Incorporated
Christopher T. Sandberg
E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES
Information
Patent Grant
Window operator with switch to operate a burglar alarm
Patent number
4,346,372
Issue date
Aug 24, 1982
Truth Incorporated
Christopher T. Sandberg
G08 - SIGNALLING