Growing community of inventors

Kurobe, Japan

Toru Umekawa

Average Co-Inventor Count = 1.50

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 = 4

Toru UmekawaHiroshi Ishisaka (1 patent)Toru UmekawaAtsunori Sugimoto (1 patent)Toru UmekawaKazuya Takase (1 patent)Toru UmekawaMasashi Daidoji (1 patent)Toru UmekawaToru Umekawa (5 patents)Hiroshi IshisakaHiroshi Ishisaka (5 patents)Atsunori SugimotoAtsunori Sugimoto (2 patents)Kazuya TakaseKazuya Takase (2 patents)Masashi DaidojiMasashi Daidoji (1 patent)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Ykk Corporation (5 from 1,383 patents)


5 patents:

1. 11191326 - Marking device and method, and method for manufacturing fastener chain

2. 11066768 - Fly edgestitching apparatus

3. 10835002 - Electric slide fastener system, radio transmitter, and slider as radio receiver

4. 10723046 - Surface fastener molding apparatus and its operational method, and a method for producing a surface fastener

5. 10076163 - Electric slide fastener system

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as of
12/21/2025
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