Alfred D. Carlson

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Robbinsdale, MN, US

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Patents Grantslast 30 patents

Information Patent Grant
Debris collecting mechanism
- Patent number 4,457,036
- Issue date Jul 3, 1984
- Tennant Company
- Alfred D. Carlson
- E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
Information Patent Grant
Combination sweeper-scrubber floor machine
- Patent number D273621
- Issue date Apr 24, 1984
- Tennant Company
- Donald J. Haub
- D32 - Washing, cleaning, or drying machine
Information Patent Grant
Scrubbing machine with water regeneration
- Patent number 4,377,017
- Issue date Mar 22, 1983
- Tennant Company
- Ferdinand J. Herpers
- E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
Information Patent Grant
Scrubbing machine with water regeneration
- Patent number 4,295,244
- Issue date Oct 20, 1981
- Tennant Company
- Ferdinand J. Herpers
- E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
Information Patent Grant
Scrubbing machine with water regeneration
- Patent number 4,194,263
- Issue date Mar 25, 1980
- Tennant Company
- Ferdinand J. Herpers
- E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES