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Hironobu Ishikawa

This inventor holds 6 USPTO granted patents. Top assignee: Ngk Spark Plug Company, Limited. Active years: 2003-2019.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Hironobu Ishikawa. Retrieved from https://idiyas.com/inventor/hironobu-ishikawa

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

USPTO Granted Patents = 6

% Patents Active = 83.3

Average Co-Inventor Count = 2.7

ph-index = 3

Forward Citations = 19(Granted Patents)

Location History:

Nagoya, JP (2003)
Aichi, JP (2003 - 2007)
Kasugai, JP (2019)

Company Filing History:

Ngk Spark Plug Company, Limited

Years Active: 2003-2019

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6 patents (USPTO):Sort by Forward CitationsExplore Patents

1. 10347521 - Heating member, electrostatic chuck, and ceramic heater (2019-07-09),

2. 7215508 - Ceramic dynamic-pressure bearing and hard disk drive using the same (2007-05-08),

3. 6702466 - Ceramic dynamic-pressure bearing, motor having bearing, hard disk drive, polygon scanner, and method for manufacturing ceramic dynamic-pressure bearing (2004-03-09),

4. 6659647 - Ceramic dynamic pressure bearing, motor with bearing, hard disk device, and polygon scanner (2003-12-09),

5. 6619848 - Ceramic dynamic pressure bearing, motor with bearing, hard disc apparatus and polygon scanner (2003-09-16),

6. 6619847 - Ceramic dynamic-pressure bearing, motor having bearing, hard disk drive, and polygon scanner (2003-09-16),

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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