Growing community of inventors

Ohtsu, Japan

Tatumi Usagawa

Average Co-Inventor Count = 4.00

ph-index = 2

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 = 50

Tatumi UsagawaYasakao Yamamoto (2 patents)Tatumi UsagawaFumihiko Itoh (2 patents)Tatumi UsagawaRyo Sakai (2 patents)Tatumi UsagawaTatumi Usagawa (2 patents)Yasakao YamamotoYasakao Yamamoto (3 patents)Fumihiko ItohFumihiko Itoh (2 patents)Ryo SakaiRyo Sakai (2 patents)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Sanyo Electric Co., Ltd. (1 from 8,782 patents)

2. Sanyo Electric., Ltd. (1 from 11 patents)


2 patents:

1. 4666113 - Device for mounting cooking apparatus

2. 4635615 - Device for mounting cooking apparatus

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as of
1/9/2026
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