Robert L. Gravel

SP Sperry: 2 patents #196 of 841Top 25%

📍 Stow, MA: #174 of 318 inventorsTop 55%

🗺 Massachusetts: #42,150 of 88,656 inventorsTop 50%

Overall (All Time): #2,372,186 of 4,157,543Top 60%

Patents All Time

Issued Patents All Time

Showing 1–2 of 2 patents

Patent #	Title	Co-Inventors	Date
4300813	Fiber optic transducer and method of manufacture therefor	—	1981-11-17
4212513	Pulse transformer technique for optical switch	—	1980-07-15