Average Co-Inventor Count = 3.00
ph-index = 2
The patent ph-index is calculated by counting the number of publications for which an author has been cited by other authors at least that same number of times.
Company Filing History:
1. U.S. Philips Corporation (1 from 14,087 patents)
2. Polygram Gmbh (1 from 17 patents)
3. Philips & Du Pont Optical Company (1 from 11 patents)
3 patents:
1. 5269409 - Package for at least one disc provided with a central center hole
2. 4916567 - Storage cassette for a disc-shaped information carrier
3. 4613751 - Conveyor system for disc magazine having an identifier disc