% Expired Patents = 33.3

Trademarks = 23

Forward Citations = 26

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8 inventors (with patents filed for the assignee):

Ajit Ramachandran (7 out of 7 patents)

Keith Sliger (6 out of 6 patents)

Ronald A Plasek (6 out of 7 patents)

4. Neil T Amundsen (1 out of 12 patents)

5. Joseph J Schachtner (1 out of 7 patents)

6. Peter Truitt (1 out of 1 patent)

7. Robert Borre (1 out of 1 patent)

8. Gregory M Guse (1 out of 1 patent)

9 patents: Sort by Forward Citations

1. 12214411 - Fast change fold-a-way cross bow swing arm multiple die tubing bender (2025-02-04),

2. D804975 - Refrigerant maintenance system (2017-12-12),

3. 7428822 - Vacuum sensor (2008-09-30),

4. 7310965 - Compressor head, internal discriminator, external discriminator, manifold design for refrigeration recovery apparatus (2007-12-25),

5. 7159412 - Compressor head, internal discriminator, external discriminator, manifold design for refrigeration recovery apparatus (2007-01-09),

6. 7073346 - Compressor head, internal discriminator, external discriminator, manifold design for refrigerant recovery apparatus and vacuum sensor (2006-07-11),

7. 6832491 - Compressor head, internal discriminator, external discriminator, manifold design for refrigerant recovery apparatus (2004-12-21),

8. 6779350 - Compressor head, internal discriminator, external discriminator, manifold design for refrigerant recovery apparatus and vacuum sensor (2004-08-24),

9. D449842 - Refrigerant recovery system case (2001-10-31),

Company Overview

Ritchie Engineering Company, Inc., founded in 1949, is a leading manufacturer of HVAC/R tools and equipment under the brand Yellow Jacket. With a focus on innovation and quality, they provide a wide range of products for technicians in the heating, ventilation, air conditioning, and refrigeration industry.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Oct 13 2026

9 Patents

#26 in Bloomington, MN

#944 in Minnesota

#32,588 in US

Bloomington, MN, United States of America

Ritchie Engineering Company, Inc.

Forward Citations = 26

8 inventors:

Ajit Ramachandran (7 out of 7 patents)

Keith Sliger (6 out of 6 patents)

Ronald A Plasek (6 out of 7 patents)

4. Neil T Amundsen (1 out of 12 patents)

5. Joseph J Schachtner (1 out of 7 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Ritchie Engineering Company, Inc.. Retrieved from https://idiyas.com/company/ritchie-engineering-company

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]