Growing community of inventors

Yokohama, Japan

Toichi Ishikawa

Average Co-Inventor Count = 1.33

ph-index = 2

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 = 224

Toichi IshikawaHiroyuki Asano (1 patent)Toichi IshikawaToichi Ishikawa (2 patents)Hiroyuki AsanoHiroyuki Asano (2 patents)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Kato Hatsujo Kaisha, Ltd. (2 from 47 patents)


2 patents:

1. 5178609 - Medical liquid injector for continuous transfusion

2. 5147319 - Winged needle

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as of
1/10/2026
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