Growing community of inventors

Fukuoka, Japan

Takayuki Yamakawa

Average Co-Inventor Count = 2.19

ph-index = 3

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 = 48

Takayuki Yamakawa ↔ Toshio Miyano (3 patents)Takayuki Yamakawa ↔ Richard L Pratt (2 patents)Takayuki Yamakawa ↔ Tetsuo Kawano (2 patents)Takayuki Yamakawa ↔ Koji Kawamoto (1 patent)Takayuki Yamakawa ↔ Hidetoshi Ryu (1 patent)Takayuki Yamakawa ↔ Frederick C Lach (1 patent)Takayuki Yamakawa ↔ Noriyuki Takada (1 patent)Takayuki Yamakawa ↔ Brian Mackinnon (1 patent)Takayuki YamakawaTakayuki Yamakawa (4 patents)Toshio MiyanoToshio Miyano (3 patents)Richard L PrattRichard L Pratt (4 patents)Tetsuo KawanoTetsuo Kawano (3 patents)Koji KawamotoKoji Kawamoto (9 patents)Hidetoshi RyuHidetoshi Ryu (2 patents)Frederick C LachFrederick C Lach (1 patent)Noriyuki TakadaNoriyuki Takada (1 patent)Brian MackinnonBrian Mackinnon (1 patent)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Kabushiki Kaisha Yaskawa Denki (4 from 1,100 patents)


4 patents:

1. 6599095 - Pump-off control method of pump jack

2. 6121748 - Method and apparatus for controlling an induction motor

3. 5938052 - Rope steadying control method and apparatus for crane or the like

4. 5731682 - Control unit and control method for motors

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12/8/2025
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