Inventor
CAMPBELL SANFORD F
US21 patents
⚠️ This page may combine multiple inventors who share the name “CAMPBELL SANFORD F”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
LETRO PRODUCTS INC
13 patentsUS6099091AAug 8, 2000
Traction enhanced wheel apparatus
LETRO PRODUCTS INC169 citations98
USD471330SMar 4, 2003
Automatic swimming pool cleaner
LETRO PRODUCTS INC48 citations96
US6003184ADec 21, 1999
Automatic swimming pool cleaner
LETRO PRODUCTS INC45 citations96
US5893188AApr 13, 1999
Automatic swimming pool cleaner
LETRO PRODUCTS INC50 citations96
US6193885B1Feb 27, 2001
Pool cleaner debris bag
LETRO PRODUCTS INC47 citations92
USD421512SMar 7, 2000
Automatic swimming pool cleaner
LETRO PRODUCTS INC46 citations92
US5603135AFeb 18, 1997
Pool cleaner with replaceable mast
LETRO PRODUCTS INC40 citations92
US5933899AAug 10, 1999
Low pressure automatic swimming pool cleaner
LETRO PRODUCTS INC78 citations91
US6158464ADec 12, 2000
Low pressure back-up valve for pool cleaner
LETRO PRODUCTS INC25 citations89
US6423217B1Jul 23, 2002
Pool cleaner having vortex drive tube
LETRO PRODUCTS INC15 citations82
USD379693SJun 3, 1997
Pool cleaner debris bag
LETRO PRODUCTS INC14 citations74
US6379542B1Apr 30, 2002
Pool cleaner with righting weight assembly
LETRO PRODUCTS INC10 citations73
US6035879AMar 14, 2000
Automatic fill valve assembly
LETRO PRODUCTS INC10 citations72