Growing community of inventors

Yokohama, Japan

Tsutomu Katsuyama

Average Co-Inventor Count = 1.00

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 = 14

Tsutomu KatsuyamaTsutomu Katsuyama (2 patents)
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Inventor’s number of patents
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Strength of working relationships

Company Filing History:

1. Bell & Howell Japan, Ltd. (1 from 2 patents)

2. Mochizuki Shoten, Limited (1 from 1 patent)


2 patents:

1. 4531819 - Device for storing exposed film for photographing and developing

2. 4370041 - Combination photographing and developing apparatus

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as of
12/20/2025
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