William M. Carroll

KM Koller Manufacturing: 3 patents #1 of 1Top 100%

📍 Milwaukee, WI: #3 of 120 inventorsTop 3%

🗺 Wisconsin: #55 of 1,637 inventorsTop 4%

Overall (1989): #6,249 of 140,708Top 5%

Patents 1989

Issued Patents 1989

Showing 1–3 of 3 patents

Patent #	Title	Co-Inventors	Date
4878632	Magnetic tape cassettes	—	1989-11-07
4845820	Process for making cassette spring	—	1989-07-11
4819890	Magnetic tape cassettes	—	1989-04-11