PD

Philip Drell

SP Sima Products: 1 patents #7 of 12Top 60%
Overall (All Time): #4,091,511 of 4,157,543Top 100%
1
Patents All Time

Issued Patents All Time

Patent #TitleCo-InventorsDate
4273436 Device for supporting and preventing curling of photographic film during developing thereof — 1981-06-16