Karl H. Felsen

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Winnipeg, CA

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Patents Grantslast 30 patents

Information Patent Grant
Connection means for suspended ceiling grid
- Patent number 5,137,390
- Issue date Aug 11, 1992
- E. H. Price Limited
- Karl H. Felsen
- E04 - BUILDING
Information Patent Grant
Manual or automatic drainage device for downspouts
- Patent number 4,135,540
- Issue date Jan 23, 1979
- Karl H. Felsen
- E04 - BUILDING