Patent Leaderboard
USPTO Patent Rankings Data through Sept 30, 2025
HG

Hermann Grobecker — 11 Patents

U.S. Philips: 6 patents #699 of 8,851Top 8%
POPhilips And Du Pont Optical: 2 patents #1 of 18Top 6%
PBPolygram International Holding B.V.: 2 patents #4 of 22Top 20%
PGPolygram Gmbh: 1 patents #5 of 24Top 25%
Garbsen, DE: #15 of 175 inventorsTop 9%
Overall (All Time): #472,697 of 4,157,543Top 15%
11 Patents All Time

Issued Patents All Time

Showing 1–11 of 11 patents

Patent #TitleCo-InventorsDate
6241089 Holding device arranged on a base plate including clamping noses 2001-06-05
6053311 Housing for accommodating disc-shaped information carriers Henning Wilhelm 2000-04-25
5938021 Hinged housing for holding a disc-shaped information carrier 1999-08-17
5855273 Housing with a retaining device arranged on a base plate Henning Wilhelm 1999-01-05
5813526 Housing Henning Wilhelm 1998-09-29
5269409 Package for at least one disc provided with a central center hole Rolf Brandt, Werner Heuer 1993-12-14
5101971 Storage cassette for a disc having a center hole 1992-04-07
4916567 Storage cassette for a disc-shaped information carrier Werner Heuer, Alois Pichler 1990-04-10
4874085 Storage cassette for high storage density, disc-shaped information carriers Werner Heher, Adelbert Zielasek, Frederik B. Nusselder 1989-10-17
4805770 Cassette with tray ejection means Gilbert E. Mestdagh, Masashi Ito 1989-02-21
4722439 Disc receiving tray and a combination of such a tray with a storage cassette Gilbert E. Mestdagh, Masashi Ito 1988-02-02