DL

David G. Leppard

CI Ciba-Geigy: 4 patents #13 of 464Top 3%
📍 Marly, CH: #1 of 3 inventorsTop 35%
Overall (1994): #6,652 of 165,921Top 5%
4
Patents 1994

Issued Patents 1994

Showing 1–4 of 4 patents

Patent #TitleCo-InventorsDate
5364749 Photographic material containing UV absorber Kurt Burdeska, Mario Slongo 1994-11-15
5300414 Photographic material containing UV absorber Vien Van Toan, Mario Slongo 1994-04-05
5298380 Photographic material which contains a UV absober 1994-03-29
5290952 Phenylthiophenyl ketones Kurt Burdeska 1994-03-01