ET

Eduard W. Tietjens

U.S. Philips: 4 patents #10 of 1,030Top 1%
📍 Drachten, NL: #1 of 12 inventorsTop 9%
Overall (1989): #5,384 of 140,708Top 4%
4
Patents 1989

Issued Patents 1989

Showing 1–4 of 4 patents

Patent #TitleCo-InventorsDate
4882840 Dry-shaving apparatus 1989-11-28
4811483 Dry-shaving apparatus with self adjusting blades Eppe Bakker 1989-03-14
4811484 Dry-shaving apparatus Willem Sjouke Wijma, Eppe Bakker, Albert Hoekstra 1989-03-14
4802281 Dry shaving apparatus 1989-02-07