Fred C. Sproul, Sr.

📍 San Marcos, CA: #447 of 897 inventorsTop 50%

🗺 California: #185,134 of 386,348 inventorsTop 50%

Overall (All Time): #2,331,195 of 4,157,543Top 60%

Patents All Time

Issued Patents All Time

Showing 1–2 of 2 patents

Patent #	Title	Co-Inventors	Date
4837569	Traffic signal directional indicator device	—	1989-06-06
4672887	Combination valance and conditioned air admission and return ducts	—	1987-06-16