Growing community of inventors

Kohbe, Japan

Yoshimasa Yokoyama

Average Co-Inventor Count = 1.54

ph-index = 7

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 = 139

Yoshimasa YokoyamaMasahiro Yamamoto (5 patents)Yoshimasa YokoyamaKazuya Koyama (1 patent)Yoshimasa YokoyamaMikio Hanioka (1 patent)Yoshimasa YokoyamaYoshimasa Yokoyama (10 patents)Masahiro YamamotoMasahiro Yamamoto (72 patents)Kazuya KoyamaKazuya Koyama (29 patents)Mikio HaniokaMikio Hanioka (1 patent)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Other (8 from 832,718 patents)

2. Hitachi Zosen Corporation (2 from 278 patents)

3. Yokoyama Sankoh Co., Ltd. (2 from 3 patents)

4. Nippon Danbohru Co., Ltd. (1 from 1 patent)


10 patents:

1. 6257412 - Folded cushioning material for packaging

2. 6254523 - Method of imparting directional permanency of folding to sheet, and apparatus therefor

3. 6199700 - Cushioning material for packaging

4. 6190756 - Hollow connected body and packaging material

5. 6132349 - Fold construction of corrugated fiberboard

6. 6129655 - Method of folding and shaping sheet, and apparatus for folding and

7. 5030510 - Freshness preservative packing material for foodstuffs and method of

8. 4882176 - Method for molding confectionery products

9. 4669986 - Writing training device

10. 4126958 - Fumigator for mosquito coil

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idiyas.com
as of
12/11/2025
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