Growing community of inventors

Atsugi, Japan

Ryoichi Annen

Average Co-Inventor Count = 3.23

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 = 8

Ryoichi AnnenKazuya Tamura (6 patents)Ryoichi AnnenKazuhide Murase (6 patents)Ryoichi AnnenKeiichi Setsumasa (2 patents)Ryoichi AnnenHirofumi Asai (2 patents)Ryoichi AnnenNobutaka Tsuneyoshi (1 patent)Ryoichi AnnenHugo William Maule (1 patent)Ryoichi AnnenMinenori Nagasaka (1 patent)Ryoichi AnnenShinji Muta (1 patent)Ryoichi AnnenNaoki Ode (1 patent)Ryoichi AnnenPeter J Steven (1 patent)Ryoichi AnnenRyoichi Annen (9 patents)Kazuya TamuraKazuya Tamura (41 patents)Kazuhide MuraseKazuhide Murase (7 patents)Keiichi SetsumasaKeiichi Setsumasa (6 patents)Hirofumi AsaiHirofumi Asai (3 patents)Nobutaka TsuneyoshiNobutaka Tsuneyoshi (12 patents)Hugo William MauleHugo William Maule (3 patents)Minenori NagasakaMinenori Nagasaka (2 patents)Shinji MutaShinji Muta (2 patents)Naoki OdeNaoki Ode (1 patent)Peter J StevenPeter J Steven (1 patent)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Mitsumi Electric Company Ltd. (9 from 1,572 patents)

2. Hewlett-packard Company (1 from 9,638 patents)


9 patents:

1. 9106110 - Power generating device and switch

2. 7777984 - Cartridge holder apparatus and magnetic recording/reproduction apparatus including same

3. 7742256 - Cartridge slot door mechanism for covering cartridge slot

4. 7619851 - Cartridge holder with a cartridge height position locking mechanism accommodating tape cartridges of differing tape widths

5. 7408736 - Magnetic recording/reproducing apparatus

6. 7379263 - Magnetic recording/reproducing apparatus

7. 7375920 - Magnetic recording/reproducing apparatus

8. 5794874 - Tape guiding pole angle adjusting mechanism

9. 5758835 - Magnetic tape apparatus for controlling a back tension of a magnetic

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as of
12/31/2025
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