Inventor

GOODFRIEND ROGER

US3 patents

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

BLACKSTONE ULTRASONIC INC

1 patent

US4899733AFeb 13, 1990

Device and technique for transurethral ultrasonic lithotripsy using a flexible ureteroscope

BLACKSTONE ULTRASONIC INC69 citations90

US ADM NATIONAL AERONUAUTICS &

1 patent

US4823793AApr 25, 1989

Cutting head for ultrasonic lithotripsy

US ADM NATIONAL AERONUAUTICS &85 citations89

BLACKSTONE CORP

1 patent

US4602633AJul 29, 1986

Methods and apparatus for disintegration of urinary calculi under direct vision

BLACKSTONE CORP19 citations78