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For the Inventor, By the Inventor

Prospect Heights, IL, United States of America

Plitek, LLC


USPTO Granted Patents = 19

% Expired Patents = 5.3



Trademarks = 4

Forward Citations = 213

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21 inventors (with patents filed for the assignee):

goldMedal Karl K Hoffman (14 out of 15 patents)

silverMedal Steve Kaganovich (6 out of 7 patents)

bronzeMedal Robert C Larsen, Jr (5 out of 5 patents)

4.  Thomas J Roberts (3 out of 4 patents)

5.  Keith P Hoffman (3 out of 3 patents)

6.  Tom Roberts (3 out of 3 patents)

7.  Douglas A Wielunski (3 out of 3 patents)

8.  Vladimir Prive (2 out of 2 patents)

9.  Roger K Engel (2 out of 2 patents)

10.  Ivan Cramer (1 out of 1 patent)

11.  Monserrat Rodriguez (1 out of 1 patent)

12.  Arthur A Sagy (1 out of 6 patents)

13.  Clay Ladd (1 out of 1 patent)

14.  John Ozcomert (1 out of 1 patent)

15.  Dave Carroll (1 out of 1 patent)


19 patents:

1. 12312140 - Package backer card with interlocking article-retaining tabs (2025-05-27),
2. 11352183 - Pressure relief valve with wetting fluid reservoirs (2022-06-07),
3. 10358275 - Pressure relief valve with a plural-part dry strap (2019-07-23),
4. 9821528 - Method for lubricating pressure relief valves (2017-11-21),
5. 9187229 - Oil-less pressure relief valves (2015-11-17),
6. 8820381 - Apparatus and method for tin-tie application (2014-09-02),
7. 8783292 - Oil-less pressure relief valves (2014-07-22),
8. 8636034 - Oil-less and wetted pressure relief valves having an integrated filter (2014-01-28),
9. 8522926 - Apparatus and method for lubricating pressure relief valves (2013-09-03),
10. 8082644 - Apparatus for the application of pressure relief valves (2011-12-27),
11. 7637283 - Pressure relief valve with stiff support (2009-12-29),
12. 7611557 - Reversed pressure relief valve (2009-11-03),
13. 7472524 - Method for the application of pressure relief valves (2009-01-06),
14. 7328543 - Apparatus and method for the application of pressure relief valves (2008-02-12),
15. 7178555 - Pressure relief valve (2007-02-20),
Company Overview
Plitek, LLC is a specialized manufacturer based in Prospect Heights, Illinois, focusing on innovative solutions in the field of medical device components and packaging. The company excels in developing advanced technologies that enhance product performance and safety, catering to the needs of the healthcare industry. With a commitment to quality and precision, Plitek leverages its expertise to deliver tailored solutions that meet the evolving demands of its clients, ensuring compliance with industry standards and fostering advancements in medical technology.
Profile summary synthesized from public USPTO records and patent filings.

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USPTO Data Jan 1 1976 - Oct 13 2026

19 Patents

#2 in Prospect Heights, IL

#876 in Illinois

#17,138 in US

#32,663 in the World

Prospect Heights, IL (US)
Prospect Heights, IL, United States of America

Plitek, LLC

Forward Citations = 213

21 inventors:

goldMedal Karl K Hoffman (14 out of 15 patents)

silverMedal Steve Kaganovich (6 out of 7 patents)

bronzeMedal Robert C Larsen, Jr (5 out of 5 patents)

4.  Thomas J Roberts (3 out of 4 patents)

5.  Keith P Hoffman (3 out of 3 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Plitek, LLC. Retrieved from https://idiyas.com/company/plitek

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]
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