Growing community of inventors

Yokohama, Japan

Seiji Sakata

Average Co-Inventor Count = 1.26

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 = 142

Seiji SakataMasayuki Hayashi (2 patents)Seiji SakataNorifumi Ito (2 patents)Seiji SakataNobuyuki Koinuma (2 patents)Seiji SakataTsuyoshi Yoshimura (2 patents)Seiji SakataTamotsu Harada (2 patents)Seiji SakataSeiji Sakata (8 patents)Masayuki HayashiMasayuki Hayashi (30 patents)Norifumi ItoNorifumi Ito (25 patents)Nobuyuki KoinumaNobuyuki Koinuma (23 patents)Tsuyoshi YoshimuraTsuyoshi Yoshimura (11 patents)Tamotsu HaradaTamotsu Harada (2 patents)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Ricoh Company, Ltd. (8 from 28,577 patents)


8 patents:

1. 5528361 - Image forming apparatus with interleaved printing from plural sources

2. 5251045 - Magnification changing system for a copier

3. 5111309 - Density control system for a digital copier

4. 5105284 - Digital copier operable with external storing medium

5. 5016114 - Digital copier apparatus with external laser card storage medium and

6. 4992884 - Copier with an optional facsimile function and method of controlling the

7. 4905098 - Copier with an optional facsimile function and method of controlling the

8. 4893194 - Multi-copy system for a digital copier

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as of
1/5/2026
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