Forward Citations = 178

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2 inventors (with patents filed for the assignee):

Osamu Nakamura (3 out of 37 patents)

Eishiro Miida (2 out of 2 patents)

5 patents: Sort by Forward Citations

1. 4900164 - Axial retainer for a cutter in a rotary drill bit (1990-02-13),

2. 4747604 - Rotary shaft seal for drill bit cutters (1988-05-31),

3. 4407375 - Pressure compensator for rotary earth boring tool (1983-10-04),

4. 4392534 - Composite nozzle for earth boring and bore enlarging bits (1983-07-12),

5. 4113290 - Pressure tight joint for a large diameter casing (1978-09-12),

Tsukamoto Seiki Co., Ltd. is a leading Japanese manufacturer of precision machining components and assemblies for various industries including automotive, aerospace, and medical. With over 50 years of experience, the company specializes in CNC machining, turning, milling, and grinding processes to deliver high-quality products to their customers worldwide.

This text is generated by artificial intelligence and may not be accurate.

Company Badge

USPTO Data Jan 1 1976 - Dec 9 2025

5 Patents

#2,449 in Tokyo

#6,487 in Japan

Tokyo, Japan

Tsukamoto Seiki Co., Ltd.

Forward Citations = 178

2 inventors:

Osamu Nakamura (3 out of 37 patents)

Eishiro Miida (2 out of 2 patents)

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