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For the Inventor, By the Inventor

Saint Paul, MN, United States of America

Tsi, Inc.


USPTO Granted Patents = 108

% Expired Patents = 4.6


Trademarks = 48

Forward Citations = 1,751

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129 inventors (with patents filed for the assignee):

goldMedal Stanley L Kaufman (13 out of 13 patents)

silverMedal Robert Caldow (11 out of 11 patents)

bronzeMedal Hee-Siew Han (11 out of 11 patents)

4.  Richard Remiarz (9 out of 9 patents)

5.  Frederick R Quant (9 out of 11 patents)

6.  Frank D Dorman (8 out of 26 patents)

7.  Jason Paul Johnson (7 out of 16 patents)

8.  Kenneth Farmer (6 out of 19 patents)

9.  Kenneth Rudolph Farmer, Ii (5 out of 7 patents)

10.  Amir A Naqwi (5 out of 6 patents)

11.  Leslie M Jenson (5 out of 6 patents)

12.  Peter P Hairston (5 out of 5 patents)

13.  Jugal K Agarwal (5 out of 6 patents)

14.  Susanne Vera Hering (4 out of 30 patents)

15.  Gregory Stephen Lewis (4 out of 25 patents)


Core Competencies:
Photoelectric Sensor
Condensation Particle Counter
Aerosol Measurement
Particle Monitoring
Flow Velocity Sensor
Wearable Mask Fit Monitor
Microwave Moisture Meter
Nanoparticle Exposure
Electrospray
Optical Particle Sizing
Biocontaminants Measurement
Respirator Testing

108 patents:

1. 12514151 - Photoelectric sensor for seed dispensing system (2026-01-06),
2. 12253452 - High-temperature condensation particle counter (2025-03-18),
3. 12022765 - Photoelectric sensor for seed dispensing system (2024-07-02),
4. 11994885 - Differential pressure liquid flow controller (2024-05-28),
5. 11933708 - Aerosol-based liquid particle detection measurement (2024-03-19),
6. 11921075 - Wick fluid system (2024-03-05),
7. 11879824 - Reducing false counts in condensation particle counters (2024-01-23),
8. 11874179 - Air and gas flow velocity and temperature sensor probe (2024-01-16),
9. 11656236 - Mirror calibration of multiple flow-measurement devices (2023-05-23),
10. 11604131 - Particulate matter sensor and method therefor (2023-03-14),
11. 11604122 - Curtain flow design for optical chambers (2023-03-14),
12. 11519841 - Condensation particle counter efficiency compensation for altitude (2022-12-06),
13. 11486803 - Passive aerosol diluter mechanism (2022-11-01),
14. 11473951 - Flow direction sensor (2022-10-18),
15. 11435278 - High-temperature condensation particle counter (2022-09-06),
Tsi, Inc., headquartered in Saint Paul, MN, specializes in advanced particle detection systems that serve a variety of industries. The company develops innovative technologies such as photoelectric sensors, condensation particle counters, and aerosol measurement devices, focusing on particle monitoring and flow velocity sensing. Tsi's expertise extends to wearable mask fit monitors and microwave moisture meters, addressing critical needs in nanoparticle exposure assessment and environmental monitoring.
Profile summary based on public USPTO records.

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USPTO Data Jan 1 1976 - Sep 29 2026

Tsi, Inc.
108 Patents

#15 in Saint Paul, MN

#88 in Minnesota

#3,530 in US

#7,270 in the World

Saint Paul, MN (US)
Saint Paul, MN, United States of America

Tsi, Inc.

Forward Citations = 1,751

129 inventors:

goldMedal Stanley L Kaufman (13 out of 13 patents)

silverMedal Robert Caldow (11 out of 11 patents)

bronzeMedal Hee-Siew Han (11 out of 11 patents)

4.  Richard Remiarz (9 out of 9 patents)

5.  Frederick R Quant (9 out of 11 patents)

Please report any incorrect information to [email protected]
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