Growing community of inventors

Tokyo, Japan

Masao Matsumoto

Average Co-Inventor Count = 1.87

ph-index = 3

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 = 40

Masao MatsumotoJun Ishikawa (2 patents)Masao MatsumotoTatsuya Sano (2 patents)Masao MatsumotoSojiro Terayama (2 patents)Masao MatsumotoYuichi Yamada (1 patent)Masao MatsumotoMasato Yamaguchi (1 patent)Masao MatsumotoKeiichi Shibata (1 patent)Masao MatsumotoMaki Ohuchi (1 patent)Masao MatsumotoMasao Matsumoto (7 patents)Jun IshikawaJun Ishikawa (23 patents)Tatsuya SanoTatsuya Sano (12 patents)Sojiro TerayamaSojiro Terayama (2 patents)Yuichi YamadaYuichi Yamada (22 patents)Masato YamaguchiMasato Yamaguchi (17 patents)Keiichi ShibataKeiichi Shibata (12 patents)Maki OhuchiMaki Ohuchi (1 patent)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Sony Corporation (4 from 58,130 patents)

2. Sony Mobile Communications Ab (2 from 458 patents)

3. Sony Ericsson Mobile Communications Ab (1 from 1,101 patents)

4. Sony Mobile Communications Inc. (1 from 729 patents)

5. Sony Ericsson Mobile Communications Japan, Inc. (1 from 150 patents)


7 patents:

1. 8526190 - Mobile terminal apparatus, method of disposing flexible board, method of correcting closing manipulation, and method of preventing damage to flexible board

2. 8496390 - Cover unit and mobile terminal including the same

3. 8428663 - Slide rotation device, slide rotation method, and portable terminal device

4. 7938586 - Mobile terminal apparatus and sliding cover device

5. 7874745 - Lock mechanism, slide apparatus, and mobile handset apparatus

6. 6512656 - Recording and/or reproducing apparatus for a magnetic tape

7. 5717540 - Magnetic tape drive

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as of
12/16/2025
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