For the Inventor, By the Inventor

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Seik Epson Corporation

USPTO Granted Patents = 1

Forward Citations = 10

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5 inventors (with patents filed for the assignee):

Koji Sumi (1 out of 74 patents)

Tsutomu Nishiwaki (1 out of 52 patents)

Masato Shimada (1 out of 60 patents)

4. Souichi Moriya (1 out of 7 patents)

5. Hong Qiu (1 out of 16 patents)

1 patent: Sort by Forward Citations

1. 6639340 - Method for manufacturing piezoelectric element, and piezoelectric element, ink-jet recording head and printer (2003-10-28),

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USPTO Data Jan 1 1976 - Dec 30 2025

1 Patents

#5,730 in Tokyo

#15,542 in Japan

Seik Epson Corporation

Forward Citations = 10

5 inventors:

Koji Sumi (1 out of 74 patents)

Tsutomu Nishiwaki (1 out of 52 patents)

Masato Shimada (1 out of 60 patents)

4. Souichi Moriya (1 out of 7 patents)

5. Hong Qiu (1 out of 16 patents)

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