Gosta Roosman

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Toronto, CA

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Patents Grantslast 30 patents

Information Patent Grant
Bore hole inclinometer apparatus
- Patent number 5,537,753
- Issue date Jul 23, 1996
- Hubert J. Otte
- E21 - EARTH DRILLING MINING
Information Patent Grant
Film storage and developing cassette
- Patent number 4,142,193
- Issue date Feb 27, 1979
- Hubert J. Otte
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Bore hole probe
- Patent number 4,047,306
- Issue date Sep 13, 1977
- Hubert Josef Otte
- E21 - EARTH DRILLING MINING