Inventor
MASON RICHARD A
US6 patents
⚠️ This page may combine multiple inventors who share the name “MASON RICHARD A”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
TENNANT CO
4 patentsUS5045118ASep 3, 1991
Method of removing debris and dust from a carpet
TENNANT CO68 citations93
US4805256AFeb 21, 1989
Scrubber squeegee pivoted concentric with brush drive
TENNANT CO58 citations92
US4138756AFeb 13, 1979
Surface maintenance machine drive and brush
TENNANT CO41 citations90
US4788480ANov 29, 1988
Voltage control for battery powered motor or the like
TENNANT CO13 citations73