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For the Inventor, By the Inventor

Baarn, Netherlands

Polygram International Holding B.v.

Calculating rank
USPTO Granted Patents = 14


Forward Citations = 402

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17 inventors (with patents filed for the assignee):

goldMedal Jozef M Duurland (5 out of 7 patents)

silverMedal Hermann Koop (3 out of 12 patents)

bronzeMedal Hermann Grobecker (2 out of 11 patents)

4.  Johannes J Roering (2 out of 5 patents)

5.  Masashi Ito (2 out of 11 patents)

6.  Hans Schuddekopf (2 out of 3 patents)

7.  Karsten Benne (2 out of 2 patents)

8.  Gilbert E Mestdagh (2 out of 2 patents)

9.  Michiel G Van Den Dungen (1 out of 2 patents)

10.  Norbert C Vollmann (1 out of 24 patents)

11.  Bjorn Bluthgen (1 out of 5 patents)

12.  Bernard H Timmer (1 out of 1 patent)

13.  Henning Wilhelm (1 out of 1 patent)

14.  Dieter Schulz (1 out of 2 patents)

15.  Sinnighe J Bos (1 out of 1 patent)


14 patents:

1. 5700500 - Two-stage injection-molding machine (1997-12-23),
2. 5404251 - Auto reverse cassette deck capable of recording/reproducing with two (1995-04-04),
3. 5148330 - Method of and arrangement for obtaining prerecorded digital music (1992-09-15),
4. 5135149 - Apparatus for the storage and transport of an elongate endless tape (1992-08-04),
5. 4882637 - Copying apparatus for copying a magnetic pattern from a master magnetic (1989-11-21),
6. 4868683 - Method of aligning objects by detecting a reference picture line therein (1989-09-19),
7. 4864439 - Apparatus drawer for unambiguously receiving a digital audio tape (1989-09-05),
8. 4805770 - Cassette with tray ejection means (1989-02-21),
9. 4750173 - Method of transmitting audio information and additional information in (1988-06-07),
10. 4747093 - Disc-shaped information carrier and method of manufacturing it (1988-05-24),
11. 4745690 - Method of replenishing and/or preparing treating liquids (1988-05-24),
12. 4726006 - Disc-shaped information carrier and method of manufacturing it (1988-02-16),
13. 4722439 - Disc receiving tray and a combination of such a tray with a storage (1988-02-02),
14. 4681280 - Magnetic-tape cassette with stretched liner arrangement (1987-07-21),
Company Overview
Polygram International Holding B.V., headquartered in Baarn, Netherlands, is a prominent player in the music and entertainment industry. The company specializes in the development and distribution of music content, leveraging innovative technologies to enhance the consumer experience. With a focus on digital media and licensing, Polygram plays a crucial role in connecting artists with audiences globally, while also exploring new avenues in music production and distribution. Its strategic initiatives aim to adapt to the evolving landscape of the entertainment sector.
Profile summary synthesized from public USPTO records and patent filings.

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USPTO Data Jan 1 1976 - Nov 3 2026

14 Patents

#1 in Baarn

#482 in Netherlands

#42,333 in the World

Baarn, NL
Baarn, Netherlands

Polygram International Holding B.v.

Forward Citations = 402

17 inventors:

goldMedal Jozef M Duurland (5 out of 7 patents)

silverMedal Hermann Koop (3 out of 12 patents)

bronzeMedal Hermann Grobecker (2 out of 11 patents)

4.  Johannes J Roering (2 out of 5 patents)

5.  Masashi Ito (2 out of 11 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Polygram International Holding B.v.. Retrieved from https://idiyas.com/company/polygram-international-holding-b-v

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

Data Sources: USPTO Patent Grant XML, Patent Center, EPO & CIPO • Normalized by IDiyas Innovation Graph. Methodology & provenance architecturePlease report any incorrect information to [email protected]
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