Growing community of inventors

Kanagawa, Japan

Ryoichi Oka

Average Co-Inventor Count = 2.53

ph-index = 4

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 = 64

Ryoichi OkaKazuhiro Watanabe (5 patents)Ryoichi OkaTakahisa Umezawa (3 patents)Ryoichi OkaTsutomu Ohira (2 patents)Ryoichi OkaSatoru Kusumoto (2 patents)Ryoichi OkaKazuhiro Watanabe (1 patent)Ryoichi OkaRyoichi Oka (8 patents)Kazuhiro WatanabeKazuhiro Watanabe (23 patents)Takahisa UmezawaTakahisa Umezawa (18 patents)Tsutomu OhiraTsutomu Ohira (2 patents)Satoru KusumotoSatoru Kusumoto (2 patents)Kazuhiro WatanabeKazuhiro Watanabe (18 patents)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Graphtec Corporation (6 from 32 patents)

2. Megatorr Corporation (1 from 1 patent)

3. Tylan General, K.k. (1 from 1 patent)


8 patents:

1. D956134 - Cutting plotter

2. 10279503 - Cutting pen, cutting plotter, and blade extension amount control method of cutting plotter

3. 10173364 - Control method of embossing apparatus

4. 10011034 - Cutting plotter

5. D802657 - Roll feeder for cutting plotter

6. D720395 - Cutting plotter

7. 6227236 - Widely variable conductance valve

8. 5413139 - Throttle valve

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idiyas.com
as of
1/21/2026
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