P

Inventor

DONALDSON JOSEPH

4 patents
⚠️ This page may combine multiple inventors who share the name “DONALDSON JOSEPH”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

(unassigned)

2 patents
US6092293AJul 25, 2000

Pencil sharpener

38 citations87
US6494638B1Dec 17, 2002

Power drive adapter device

12 citations68

FLADE LLC

1 patent
US7523557B2Apr 28, 2009

Carpenter's pencil sharpener

FLADE LLC10 citations80

DONALDSON JOSEPH

1 patent
USD420390SFeb 8, 2000

Pencil sharpener

DONALDSON JOSEPH13 citations65