Growing community of inventors

Ikeda, Japan

Michiko Oba

Average Co-Inventor Count = 5.09

ph-index = 6

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 = 173

Michiko ObaHiroshi Tsuji (3 patents)Michiko ObaShoichi Masui (3 patents)Michiko ObaSatoshi Wakayama (3 patents)Michiko ObaKazuhiro Kawashima (3 patents)Michiko ObaNorihisa Komoda (3 patents)Michiko ObaYoji Taniguchi (3 patents)Michiko ObaHirohide Haga (3 patents)Michiko ObaToyozo Aoyama (3 patents)Michiko ObaKeiichi Hara (2 patents)Michiko ObaTetsushi Tomizawa (1 patent)Michiko ObaKouichi Taniguchi (1 patent)Michiko ObaMichiko Oba (6 patents)Hiroshi TsujiHiroshi Tsuji (51 patents)Shoichi MasuiShoichi Masui (31 patents)Satoshi WakayamaSatoshi Wakayama (19 patents)Kazuhiro KawashimaKazuhiro Kawashima (18 patents)Norihisa KomodaNorihisa Komoda (14 patents)Yoji TaniguchiYoji Taniguchi (10 patents)Hirohide HagaHirohide Haga (6 patents)Toyozo AoyamaToyozo Aoyama (4 patents)Keiichi HaraKeiichi Hara (3 patents)Tetsushi TomizawaTetsushi Tomizawa (5 patents)Kouichi TaniguchiKouichi Taniguchi (2 patents)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Hitachi, Ltd. (6 from 42,496 patents)

2. Hitachi Microcomputer System, Ltd. (2 from 61 patents)


6 patents:

1. 6434603 - System for task tracking and controlling electronic mail

2. 6047315 - System for task tracking and controlling electronic mail

3. 5764898 - System for task tracking and controlling electronic mail

4. 5303147 - Computer aided planning method and system

5. 5303144 - Computer aided planning support system

6. 5241465 - Method for determining optimum schedule in computer-aided scheduling

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12/28/2025
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