Inventor

BLACK JOSEPH R

US2 patents

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

BLACK JOSEPH R

1 patent

US5451163ASep 19, 1995

Method of teaching reading including displaying one or more visible symbols in a transparent medium between student and teacher

BLACK JOSEPH R72 citations87

ALLIED SIGNAL INC

1 patent

US4969485ANov 13, 1990

Butterfly valve apparatus and method

ALLIED SIGNAL INC17 citations70