Inventor
WILLIS DAVID R
US8 patents
⚠️ This page may combine multiple inventors who share the name “WILLIS DAVID R”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
MEARTHANE PROD CORP
4 patentsUS5967552AOct 19, 1999
In-line wheeled skate
MEARTHANE PROD CORP49 citations95
US5836591ANov 17, 1998
In-line wheeled skate for extreme skating
MEARTHANE PROD CORP44 citations91
US6260861B1Jul 17, 2001
Variable traction wheel for in-line roller skate
MEARTHANE PROD CORP7 citations71
US5829757ANov 3, 1998
Variable traction wheel for in-line roller skate
MEARTHANE PROD CORP9 citations71