% Expired Patents = 14.3

Forward Citations = 202

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6 inventors (with patents filed for the assignee):

Peter A Achten (7 out of 7 patents)

Theodorus G Potma (6 out of 7 patents)

Peter A J Achten (4 out of 10 patents)

4. Peter Augustinus Johannes Achten (2 out of 10 patents)

5. Peter Augustinius Johannes Achten (1 out of 1 patent)

6. Maria Pauline Engel (1 out of 1 patent)

14 patents: Sort by Forward Citations

1. 7090472 - Pump or motor with interconnected chambers in the rotor (2006-08-15),

2. 7028470 - Apparatus for executing activities assisted by hydromotors and a hydraulic transformer for use in such an apparatus (2006-04-18),

3. 6893231 - Hydraulic device (2005-05-17),

4. 6823671 - Free-piston unit for generating hydraulic energy (2004-11-30),

5. 6575076 - Hydraulic installations (2003-06-10),

6. 6279517 - Free piston engine provided with a purging air dosing system (2001-08-28),

7. 6223529 - Hydraulic system with a hydromotor fed by a hydraulic transformer (2001-05-01),

8. 6116138 - Pressure transformer (2000-09-12),

9. 5983638 - Hydraulic switching valve, and a free piston engine provided therewith (1999-11-16),

10. 5829393 - Free-piston engine (1998-11-03),

11. 5556262 - Free-piston engine having a fluid energy unit (1996-09-17),

12. 5540193 - Method for the cold start of a free-piston engine; and free-piston (1996-07-30),

13. 5482445 - Free-piston engine having a slidable ring for moving the piston (1996-01-09),

14. 5473893 - Free-piston engine having a fluid pressure unit (1995-12-12),

Company Overview

Innas Free Piston B.V. is a Dutch company specializing in advanced energy conversion technologies, particularly focusing on free piston engines. These innovative systems are designed to enhance efficiency and reduce emissions in various applications, including automotive and power generation. The company leverages cutting-edge research in thermodynamics and mechanical engineering to develop solutions that aim to revolutionize traditional engine designs, contributing to a more sustainable energy landscape.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Oct 20 2026

14 Patents

#13 in

#482 in Netherlands

#42,290 in the World

NL

Innas Free Piston B.v.

Forward Citations = 202

6 inventors:

Peter A Achten (7 out of 7 patents)

Theodorus G Potma (6 out of 7 patents)

Peter A J Achten (4 out of 10 patents)

4. Peter Augustinus Johannes Achten (2 out of 10 patents)

5. Peter Augustinius Johannes Achten (1 out of 1 patent)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Innas Free Piston B.v.. Retrieved from https://idiyas.com/company/innas-free-piston-b-v

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]