Inventor
HEKMAN FREDERICK A
US8 patents
⚠️ This page may combine multiple inventors who share the name “HEKMAN FREDERICK A”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
TENNANT CO
3 patentsUS6735812B2May 18, 2004
Dual mode carpet cleaning apparatus utilizing an extraction device and a soil transfer cleaning medium
TENNANT CO211 citations94
US7967914B2Jun 28, 2011
Method and apparatus for cleaning fabrics, floor coverings, and bare floor surfaces utilizing a soil transfer medium
TENNANT CO36 citations90
US7272870B2Sep 25, 2007
Secondary introduction of fluid into vacuum system
TENNANT CO26 citations88