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For the Inventor, By the Inventor

Lee, NH, United States of America

L&l Engineering, LLC


USPTO Granted Patents = 21

% Expired Patents = 14.3


Forward Citations = 293

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5 inventors (with patents filed for the assignee):

goldMedal Stewart Gall Kenly (14 out of 24 patents)

silverMedal Paul W Latham, Ii (11 out of 39 patents)

bronzeMedal Paul Latham (10 out of 18 patents)

4.  John Christopher Canfield (6 out of 13 patents)

5.  Laszlo Balogh (1 out of 13 patents)

6.  John C Canfield (0 patent)

7.  Stuart Kenly (0 patent)


21 patents:

1. 8751021 - Methods and systems for adaptive control (2014-06-10),
2. 8700184 - Methods and systems for adaptive control (2014-04-15),
3. 8508205 - Buck DC-to-DC converter and method (2013-08-13),
4. 8384363 - Buck DC-to-DC converter and method (2013-02-26),
5. 8344716 - Methods and systems for power supply adaptive control utilizing transfer function measurements (2013-01-01),
6. 8285502 - Digital compensator for power supply applications (2012-10-09),
7. 8253402 - Methods and systems for component value estimation in power supplies/converters (2012-08-28),
8. 8212543 - Method and systems for conduction mode control (2012-07-03),
9. 8154264 - Method and systems for conduction mode control (2012-04-10),
10. 8120401 - Methods and systems for digital pulse width modulator (2012-02-21),
11. 8059018 - Systems and methods for digital control utilizing oversampling (2011-11-15),
12. 8014879 - Methods and systems for adaptive control (2011-09-06),
13. 7986135 - Method and systems for conduction mode control (2011-07-26),
14. 7915881 - Buck DC-to-DC converter and method (2011-03-29),
15. 7884591 - Non-linear PWM controller for DC-to-DC converters (2011-02-08),
Company Overview
L&L Engineering, LLC is a specialized engineering firm based in Lee, New Hampshire, focusing on advanced engineering solutions and product development. The company excels in areas such as mechanical design, prototyping, and manufacturing support, catering to a diverse range of industries including aerospace, automotive, and consumer products. With a commitment to innovation and quality, L&L Engineering leverages its expertise to deliver tailored solutions that meet the evolving needs of its clients.
Profile summary synthesized from public USPTO records and patent filings.

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USPTO Data Jan 1 1976 - Oct 13 2026

L&l Engineering, LLC USPTO Patent Assignee Logo
21 Patents

#1 in Lee, NH

#104 in New Hampshire

#15,695 in US

#29,961 in the World

Lee, NH (US)
Lee, NH, United States of America

L&l Engineering, LLC

Forward Citations = 293

5 inventors:

goldMedal Stewart Gall Kenly (14 out of 24 patents)

silverMedal Paul W Latham, Ii (11 out of 39 patents)

bronzeMedal Paul Latham (10 out of 18 patents)

4.  John Christopher Canfield (6 out of 13 patents)

5.  Laszlo Balogh (1 out of 13 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: L&l Engineering, LLC. Retrieved from https://idiyas.com/company/l-and-l-engineering

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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