Herbert I. Gefvert

📍 Lake Forest, IL: #6 of 17 inventorsTop 40%

🗺 Illinois: #802 of 3,813 inventorsTop 25%

Overall (1989): #106,971 of 140,708Top 80%

Patents 1989

Issued Patents 1989

Showing 1–1 of 1 patents

Patent #	Title	Co-Inventors	Date
4888804	Sound reproduction system	—	1989-12-19