Growing community of inventors

Hitachinaka, Japan

Nobuhisa Sugawara

Average Co-Inventor Count = 3.00

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 = 92

Nobuhisa Sugawara ↔ Yasuo Etou (2 patents)Nobuhisa Sugawara ↔ Takashi Ueda (1 patent)Nobuhisa Sugawara ↔ Hitoshi Tsuzuki (1 patent)Nobuhisa Sugawara ↔ Kenji Kataoka (1 patent)Nobuhisa Sugawara ↔ Takashi Ozawa (1 patent)Nobuhisa SugawaraNobuhisa Sugawara (3 patents)Yasuo EtouYasuo Etou (8 patents)Takashi UedaTakashi Ueda (41 patents)Hitoshi TsuzukiHitoshi Tsuzuki (15 patents)Kenji KataokaKenji Kataoka (15 patents)Takashi OzawaTakashi Ozawa (14 patents)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Hitachi Koki Co., Ltd. (3 from 1,267 patents)


3 patents:

1. D499945 - Impact driver

2. D496843 - Portable electric driver drill

3. D482254 - Portable electric drill

Please report any incorrect information to support@idiyas.com
idiyas.com
as of
1/8/2026
Loading…