Growing community of inventors

Kanagawa, Japan

Hiroshi Ohtsuka

Average Co-Inventor Count = 2.26

ph-index = 4

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 = 142

Hiroshi OhtsukaTakahisa Umezawa (3 patents)Hiroshi OhtsukaJunichi Sakamoto (1 patent)Hiroshi OhtsukaTsuyoshi Nishida (1 patent)Hiroshi OhtsukaSusumu Shoji (1 patent)Hiroshi OhtsukaLawrence D Emmons (1 patent)Hiroshi OhtsukaHitoshi Fujimoto (1 patent)Hiroshi OhtsukaYutaka Ueno (1 patent)Hiroshi OhtsukaFumiaki Komatsu (1 patent)Hiroshi OhtsukaJames S Mackley (1 patent)Hiroshi OhtsukaShinya Yokodate (1 patent)Hiroshi OhtsukaKazuyuki Saigusa (1 patent)Hiroshi OhtsukaSakae Hayao (1 patent)Hiroshi OhtsukaAkifumi Kabasawa (1 patent)Hiroshi OhtsukaShinichi Sasaki (1 patent)Hiroshi OhtsukaKenichi Kashiwagi (1 patent)Hiroshi OhtsukaHiroshi Ohtsuka (8 patents)Takahisa UmezawaTakahisa Umezawa (18 patents)Junichi SakamotoJunichi Sakamoto (42 patents)Tsuyoshi NishidaTsuyoshi Nishida (41 patents)Susumu ShojiSusumu Shoji (16 patents)Lawrence D EmmonsLawrence D Emmons (13 patents)Hitoshi FujimotoHitoshi Fujimoto (9 patents)Yutaka UenoYutaka Ueno (6 patents)Fumiaki KomatsuFumiaki Komatsu (5 patents)James S MackleyJames S Mackley (4 patents)Shinya YokodateShinya Yokodate (4 patents)Kazuyuki SaigusaKazuyuki Saigusa (3 patents)Sakae HayaoSakae Hayao (2 patents)Akifumi KabasawaAkifumi Kabasawa (1 patent)Shinichi SasakiShinichi Sasaki (1 patent)Kenichi KashiwagiKenichi Kashiwagi (1 patent)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Graphtec Corporation (4 from 32 patents)

2. Mitsubishi Denki Kabushiki Kaisha (2 from 21,351 patents)

3. Mitsubishi Pencil Company, Limited (2 from 383 patents)

4. Luma Telecom Incorporated (1 from 6 patents)


8 patents:

1. D977002 - X-Y plotter for cutting

2. D972006 - X-Y plotter for cutting

3. D951341 - X-Y plotter for cutting

4. 9994066 - Erasing implement and writing implement provided with erasing implement

5. 9519255 - Label printer

6. 9409438 - Writing instrument with erasing member

7. 4962521 - Apparatus for still picture video telephone apparatus and methods for

8. 4943994 - Still picture picturephone communications system

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as of
12/20/2025
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