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Eindhoven, Netherlands

Willem L Van Der Kruk

Average Co-Inventor Count = 2.00

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.

Forward Citations = 14

Willem L Van Der KrukJozef M Duurland (2 patents)Willem L Van Der KrukJohannes J Roering (2 patents)Willem L Van Der KrukBoele De Bie (1 patent)Willem L Van Der KrukGeorge T Woo (1 patent)Willem L Van Der KrukWillem L Van Der Kruk (4 patents)Jozef M DuurlandJozef M Duurland (7 patents)Johannes J RoeringJohannes J Roering (5 patents)Boele De BieBoele De Bie (1 patent)George T WooGeorge T Woo (1 patent)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. U.S. Philips Corporation (4 from 14,087 patents)

2. Polygram International Holding (1 from 1 patent)


4 patents:

1. 5901006 - Apparatus for recording information signals on a record carrier

2. 5444675 - Cassette adapter for a playback deck of the front-loading or the

3. 5371634 - Arrangement for obtaining prerecorded digital music cassettes

4. 5243470 - Arrangement for obtaining prerecorded digital music cassettes

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12/15/2025
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