DH

Duane E. Harrington

UN Unknown: 1 patents #29,356 of 83,584Top 40%
📍 San Francisco, CA: #8,108 of 26,999 inventorsTop 35%
🗺 California: #106,790 of 386,348 inventorsTop 30%
Overall (All Time): #1,066,626 of 4,157,543Top 30%
5
Patents All Time

Issued Patents All Time

Showing 1–5 of 5 patents

Patent #TitleCo-InventorsDate
4312295 Cat box litter screening device 1982-01-26
4259140 Paper wiring apparatus 1981-03-31
RE30558 Integral cigarette paper holder element 1981-03-31
4250649 D Bite lite George Spector 1981-02-17
4242170 Paper wiring transport apparatus and process Merritt A. Robinson 1980-12-30