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Tondabayashi, Japan

Masayoshi Onishi

This inventor holds 7 USPTO granted patents. Top assignee: Koyo Seiko Company, Ltd.. Active years: 1993-1999.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Masayoshi Onishi. Retrieved from https://idiyas.com/inventor/masayoshi-onishi-d9ry6vlw

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

Calculating rank

USPTO Granted Patents = 7

% Patents Active = 100.0

Average Co-Inventor Count = 1.8

ph-index = 5

Forward Citations = 58(Granted Patents)

Location History:

Sakai, JP (1993 - 1995)
Tondabayashi, JP (1995 - 1999)

Company Filing History:

Koyo Seiko Company, Ltd.

Years Active: 1993-1999

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7 patents (USPTO):Sort by Forward CitationsExplore Patents

1. 6000850 - Dynamic pressure bearing made of porous material (1999-12-14),

2. 5472283 - Cylindrical dynamic pressure bearing formed of polyphenylene sulfide (1995-12-05),

3. 5415476 - Dynamic pressure bearing with cross grooves between two axially (1995-05-16),

4. 5403098 - Hydrodynamic bearing device (1995-04-04),

5. 5398493 - Spindle device capable of eliminating a rotational drive mechanism for a (1995-03-21),

6. 5356226 - Bearing device (1994-10-18),

7. 5240332 - Dynamic pressure bearing device (1993-08-31),

Profile summary based on public USPTO records.

Data Sources: USPTO Patent Grant XML, Patent Center, EPO & CIPO • Normalized by IDiyas Innovation Graph. Methodology & provenance architecturePlease report any incorrect information to [email protected]

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