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% Expired Patents = 100.0

EPO Patents = 4

Trademarks = 2

Forward Citations = 1

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9 inventors (with patents filed for the assignee):

Takeshi Miyazaki (3 out of 184 patents)

Hideyuki Ohyi (3 out of 3 patents)

Kazuhiko Kobayashi (2 out of 56 patents)

4. Takashi Obara (2 out of 23 patents)

5. Kunito Hayashi (2 out of 2 patents)

6. Osamu Masuda (1 out of 13 patents)

7. Hiroyuki Miyata (1 out of 5 patents)

8. Akira Kojima (1 out of 33 patents)

9. Kazumi Furuta (1 out of 17 patents)

10. Noboru Murayama (47 patents)

5 patents: Sort by Forward Citations

1. 8232711 - Surface emission type electron source and drawing device (2012-07-31),

2. 8158310 - Aberration evaluation pattern, aberration evaluation method, aberration correction method, electron beam drawing apparatus, electron microscope, master, stamper, recording medium, and structure (2012-04-17),

3. 7929396 - Electron beam applying apparatus and drawing apparatus (2011-04-19),

4. 7522510 - Electron beam applying apparatus and drawing apparatus (2009-04-21),

5. 6989536 - Electron-beam writing device and electron-beam writing method (2006-01-24),

Crestec Corporation is a leading provider of engineering solutions, specializing in the development of innovative products and services for various industries. With a strong emphasis on quality, creativity, and customer satisfaction, Crestec is committed to delivering cutting-edge solutions that meet the evolving needs of its clients. Through its global network of offices and partners, Crestec works tirelessly to ensure the success of its customers and the longevity of their businesses.

Profile summary based on public USPTO records.

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USPTO Data Jan 1 1976 - Sep 29 2026

5 Patents

#2,719 in Tokyo

#6,649 in Japan

Tokyo, Japan

Crestec Corporation