Inventor
CARLSON ALFRED D
5 patents
⚠️ This page may combine multiple inventors who share the name “CARLSON ALFRED D”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
TENNANT CO
4 patentsUSD273621SApr 24, 1984
Combination sweeper-scrubber floor machine
TENNANT CO60 citations94
US4377017AMar 22, 1983
Scrubbing machine with water regeneration
TENNANT CO57 citations94
US4457036AJul 3, 1984
Debris collecting mechanism
TENNANT CO50 citations91
US4295244AOct 20, 1981
Scrubbing machine with water regeneration
TENNANT CO32 citations90