Growing community of inventors

Tokyo, Japan

Iwao Numakura

Average Co-Inventor Count = 2.17

ph-index = 8

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 = 151

Iwao NumakuraTakashi Numakura (14 patents)Iwao NumakuraSusumu Kitazawa (4 patents)Iwao NumakuraNoriaki Tsukada (2 patents)Iwao NumakuraAkira Inoue (1 patent)Iwao NumakuraMasaru Murakami (1 patent)Iwao NumakuraKiyoshi Tanaka (1 patent)Iwao NumakuraYoshihito Tanaka (1 patent)Iwao NumakuraTadayoshi Saito (1 patent)Iwao NumakuraKazunori Tsuge (1 patent)Iwao NumakuraKoji Akiyama (1 patent)Iwao NumakuraHirotoshi Yoshimura (1 patent)Iwao NumakuraKazuyoshi Nishio (1 patent)Iwao NumakuraTakehiro Kato (1 patent)Iwao NumakuraJunichi Naya (1 patent)Iwao NumakuraIwao Numakura (17 patents)Takashi NumakuraTakashi Numakura (14 patents)Susumu KitazawaSusumu Kitazawa (4 patents)Noriaki TsukadaNoriaki Tsukada (2 patents)Akira InoueAkira Inoue (127 patents)Masaru MurakamiMasaru Murakami (25 patents)Kiyoshi TanakaKiyoshi Tanaka (3 patents)Yoshihito TanakaYoshihito Tanaka (2 patents)Tadayoshi SaitoTadayoshi Saito (1 patent)Kazunori TsugeKazunori Tsuge (1 patent)Koji AkiyamaKoji Akiyama (1 patent)Hirotoshi YoshimuraHirotoshi Yoshimura (1 patent)Kazuyoshi NishioKazuyoshi Nishio (1 patent)Takehiro KatoTakehiro Kato (1 patent)Junichi NayaJunichi Naya (1 patent)
..
Inventor’s number of patents
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Strength of working relationships

Company Filing History:

1. Yamatoya Company Limited (15 from 19 patents)

2. Other (1 from 832,843 patents)

3. Tokai Shinei Electronics Inidustry Co., Ltd (1 from 1 patent)

4. Yamatoyo & Co., Ltd. (1 from 1 patent)

5. Yamotoya & Co., Ltd. (1 from 1 patent)


17 patents:

1. 9857687 - Method of manufacturing substrate and substrate and mask film

2. 6391473 - Cu plated ceramic substrate and a method of manufacturing the same

3. 5841897 - Method for the tonal control or adjustment of reproduced color image and

4. 5406394 - Color reproducing method used in an image data processing system

5. 5371616 - Tonal conversion method of a picture

6. 5357349 - Tonal conversion method for a picture

7. 5313310 - Tonal conversion method for pictures

8. 5286609 - Process for the formation of a negative resist pattern from a

9. 5212518 - Tonal conversion method for a faded color photographic original picture

10. 5134494 - Method for producing color and black plates in a multi-color plate

11. 5072305 - Picture producing apparatus using picture information values correlated

12. 5057931 - Tonal conversion method of pictures for producing reproduced pictures

13. 5014120 - Method for processing picture to be reproduced on color picture tube and

14. 4956718 - Tonal conversion method for pictures

15. 4924323 - Tonal conversion method for pictures

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12/30/2025
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