For the Inventor, By the Inventor

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Saint Paul, MN, United States of America

Tsi, Inc.

USPTO Granted Patents = 108

% Expired Patents = 4.6

EPO Patents = 18

Trademarks = 48

Forward Citations = 1,751

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129 inventors (with patents filed for the assignee):

Stanley L Kaufman (13 out of 13 patents)

Robert Caldow (11 out of 11 patents)

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: Sort by Forward Citations

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),

Company Overview

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 synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Oct 20 2026

108 Patents

#15 in Saint Paul, MN

#89 in Minnesota

#3,542 in US

#7,287 in the World

Saint Paul, MN, United States of America

Tsi, Inc.

Forward Citations = 1,751

129 inventors:

Stanley L Kaufman (13 out of 13 patents)

Robert Caldow (11 out of 11 patents)

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)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Tsi, Inc.. Retrieved from https://idiyas.com/company/tsi

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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