North Hollywood, CA, United States of America

Roto-Master, Inc.

Calculating rank

USPTO Granted Patents = 6

Forward Citations = 86

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6 inventors (with patents filed for the assignee):

Hugh MacInnes (5 out of 7 patents)

Andrew E Johnston (3 out of 4 patents)

Jon A Meyer (2 out of 3 patents)

4. Robert A Keller (1 out of 2 patents)

5. John W Fort, Jr (1 out of 1 patent)

6. Ronald Miller (1 out of 1 patent)

6 patents: Sort by Forward Citations

1. 4815184 - Method of fabricating a turbocharger water-cooled bearing housing (1989-03-28),

2. 4530640 - Method and apparatus for wastegating turbocharged engine with divided (1985-07-23),

3. 4504187 - Turbocharger method of operation and turbine housing therefor (1985-03-12),

4. 4474484 - Semi-floating bearing (1984-10-02),

5. D259507 - Tubocharger by-pass valve (1981-06-09),

6. 4027994 - Partially divided turbine housing for turbochargers and the like (1977-06-07),

Company Overview

Roto-master, Inc. is a leading provider of industrial rotating equipment for various industries. With over 20 years of experience, we specialize in the design, manufacturing, and distribution of high-quality rotary equipment such as pumps, compressors, and turbines. Our innovative solutions and superior customer service make us a trusted partner for companies seeking reliable rotating equipment for their operations.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Oct 27 2026

6 Patents

#13 in North Hollywood, CA

#10,583 in California

#45,030 in US

North Hollywood, CA, United States of America

Roto-Master, Inc.

Forward Citations = 86

6 inventors:

Hugh MacInnes (5 out of 7 patents)

Andrew E Johnston (3 out of 4 patents)

Jon A Meyer (2 out of 3 patents)

4. Robert A Keller (1 out of 2 patents)

5. John W Fort, Jr (1 out of 1 patent)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Roto-Master, Inc.. Retrieved from https://idiyas.com/company/roto-master

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

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]