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For the Inventor, By the Inventor

Schaffhausen, Switzerland

Sherwood Services Ag


USPTO Granted Patents = 268

% Expired Patents = 12.7



Trademarks = 55

Forward Citations = 101,229

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261 inventors (with patents filed for the assignee):

goldMedal Steven Paul Buysse (26 out of 74 patents)

silverMedal Dale Francis Schmaltz (22 out of 47 patents)

bronzeMedal Kate Ryland Lawes (19 out of 27 patents)

4.  Eric R Cosman, Sr (19 out of 91 patents)

5.  Arlan James Reschke (17 out of 41 patents)

6.  Sean T Dycus (16 out of 68 patents)

7.  Kristin D Johnson (15 out of 83 patents)

8.  Joe Don Sartor (15 out of 128 patents)

9.  Jenifer Serafin Kennedy (12 out of 24 patents)

10.  Michael C Moses (11 out of 29 patents)

11.  Michael J Lands (11 out of 17 patents)

12.  Philip Mark Tetzlaff (11 out of 57 patents)

13.  Daniel Lee Trimberger, Ii (10 out of 10 patents)

14.  Mathew Erle Mitchell (10 out of 10 patents)

15.  Paul Ray Romero (10 out of 38 patents)


Core Competencies:
Electrosurgical Pencil
Vessel Sealer
Bipolar Forceps
Ultrasonic Power Amplifier
Medical Waste Disposal
Thermometer Probe
Laparoscopic Instruments
Cutting Mechanism
Safety Features
Neural Tissue Modification
RF Medical Generator
Tissue Sealing

268 patents:

1. 7530977 - Infusion and/or withdrawal fitting for biomedical fluid circuits (2009-05-12),
2. 7513363 - Medical implement distribution and collection system (2009-04-07),
3. 7416437 - Connector systems for electrosurgical generator (2008-08-26),
4. 7396336 - Switched resonant ultrasonic power amplifier system (2008-07-08),
5. 7393354 - Electrosurgical pencil with drag sensing capability (2008-07-01),
6. 7384421 - Slide-activated cutting assembly (2008-06-10),
7. 7384420 - Vessel sealer and divider (2008-06-10),
8. 7377920 - Laparoscopic bipolar electrosurgical instrument (2008-05-27),
9. 7367976 - Bipolar forceps having monopolar extension (2008-05-06),
10. RE40279 - Method and system for neural tissue modification (2008-04-28),
11. D567943 - Over-ratchet safety for a vessel sealing instrument (2008-04-29),
12. 7364577 - Vessel sealing system (2008-04-29),
13. 7360398 - Receptacle for sensors (2008-04-22),
14. D564662 - Hourglass-shaped knife for electrosurgical forceps (2008-03-18),
15. 7329256 - Vessel sealing instrument (2008-02-12),
Company Overview
Sherwood Services AG, based in Schaffhausen, Switzerland, specializes in the development and manufacturing of advanced electrosurgical instruments. The company focuses on a range of medical technologies, including electrosurgical pencils, vessel sealers, and bipolar forceps, which are essential for precision in surgical procedures. Additionally, Sherwood Services is involved in creating ultrasonic power amplifiers and laparoscopic instruments, contributing to innovations in minimally invasive surgery and effective medical waste disposal solutions.
Profile summary synthesized from public USPTO records and patent filings.

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USPTO Data Jan 1 1976 - Oct 20 2026

268 Patents

#5 in Schaffhausen

#69 in Switzerland

#3,281 in the World

Schaffhausen, CH
Schaffhausen, Switzerland

Sherwood Services Ag

Forward Citations = 101,229

261 inventors:

goldMedal Steven Paul Buysse (26 out of 74 patents)

silverMedal Dale Francis Schmaltz (22 out of 47 patents)

bronzeMedal Kate Ryland Lawes (19 out of 27 patents)

4.  Eric R Cosman, Sr (19 out of 91 patents)

5.  Arlan James Reschke (17 out of 41 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Sherwood Services Ag. Retrieved from https://idiyas.com/company/sherwood-services-ag

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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