Growing community of inventors

Osaka, Japan

Hirohisa Shimizu

Average Co-Inventor Count = 1.11

ph-index = 5

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 = 87

Hirohisa ShimizuHideaki Miyoshi (2 patents)Hirohisa ShimizuShigetsugu Ozaki (1 patent)Hirohisa ShimizuShigechika Kobayashi (1 patent)Hirohisa ShimizuHirohisa Shimizu (17 patents)Hideaki MiyoshiHideaki Miyoshi (7 patents)Shigetsugu OzakiShigetsugu Ozaki (2 patents)Shigechika KobayashiShigechika Kobayashi (2 patents)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Oohiro Works, Ltd. (16 from 66 patents)

2. Oohiro Works Co., Ltd. (1 from 2 patents)


17 patents:

1. 6679908 - Facial treatment device

2. 6651674 - Hair heating device having concentric reverse reduction gearing

3. D474562 - Hair processing accelerator

4. 6526605 - Automatic hair washer

5. 6442340 - Hair processing accelerator with rotatably adjustable semicircular heaters

6. 6430365 - Hair processing accelerator with rotatable adjustable semicircular heaters

7. 6408455 - Automatic hair washer

8. 6401272 - Hair washer

9. 6367101 - Automatic hair washer

10. 6291051 - Waterproof sheet for hair washing and automatic hair washer using such waterproof sheet

11. 6269492 - Automatic hair washer

12. 6249922 - Automatic hair washer

13. 6243888 - Hair washer

14. 6233755 - Hair washer

15. 6212703 - Hair washing apparatus and a neck receiving member used therefor

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as of
1/3/2026
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