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John R. Heckrotte, Sr.

📍 Phoenix, AZ: #2,590 of 6,660 inventorsTop 40%
🗺 Arizona: #13,050 of 32,909 inventorsTop 40%
Overall (All Time): #2,368,690 of 4,157,543Top 60%
2
Patents All Time

Issued Patents All Time

Showing 1–2 of 2 patents

Patent #TitleCo-InventorsDate
4364287 Method for making a key for driving tamper-proof bolt — 1982-12-21
4291599 Key for driving tamper-proof bolt — 1981-09-29