Growing community of inventors

Ichikawa, Japan

Sumiko Maruyama

Average Co-Inventor Count = 3.00

ph-index = 1

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 = 5

Sumiko Maruyama ↔ Tetsuro Goto (1 patent)Sumiko Maruyama ↔ Shiro Sugimori (1 patent)Sumiko MaruyamaSumiko Maruyama (1 patent)Tetsuro GotoTetsuro Goto (102 patents)Shiro SugimoriShiro Sugimori (4 patents)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Nippon Kogaku K.k. (1 from 849 patents)


1 patent:

1. 4251147 - Electronic flash with calculator

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as of
12/30/2025
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