Growing community of inventors

Tokyo, Japan

Sakae Hayao

Average Co-Inventor Count = 2.40

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 = 0

Sakae HayaoTsuyoshi Nishida (1 patent)Sakae HayaoKazuhiko Furukawa (1 patent)Sakae HayaoHiroshi Ohtsuka (1 patent)Sakae HayaoSakae Hayao (2 patents)Tsuyoshi NishidaTsuyoshi Nishida (41 patents)Kazuhiko FurukawaKazuhiko Furukawa (41 patents)Hiroshi OhtsukaHiroshi Ohtsuka (8 patents)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Mitsubishi Pencil Company, Limited (2 from 383 patents)


2 patents:

1. 9994066 - Erasing implement and writing implement provided with erasing implement

2. 6382862 - Application liquid reservoir

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as of
12/20/2025
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