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Daniel C. Bjorkquist
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New Brighton, MN, US
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Patents Grants
last 30 patents
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Patent Grant
In situ respirator fit testing
Patent number
11,305,138
Issue date
Apr 19, 2022
TSI Incorporated
Daniel C. Bjorkquist
A62 - LIFE-SAVING FIRE-FIGHTING
Information
Patent Grant
Condensation particle counter false count performance
Patent number
10,914,667
Issue date
Feb 9, 2021
TSI Incorporated
Sreenath Avula
G01 - MEASURING TESTING
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Patent Grant
Condensation particle counter false count performance
Patent number
10,520,414
Issue date
Dec 31, 2019
TSI Incorporated
Sreenath Avula
G01 - MEASURING TESTING
Information
Patent Grant
Condensation particle counter false count performance
Patent number
10,488,314
Issue date
Nov 26, 2019
TSI Incorporated
Sreenath Avula
G01 - MEASURING TESTING
Information
Patent Grant
Laser optical measuring device and method for stabilizing fringe pa...
Patent number
4,948,257
Issue date
Aug 14, 1990
TSI Incorporated
Stanley L. Kaufman
G01 - MEASURING TESTING
Patents Applications
last 30 patents
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Patent Application
IN SITU RESPIRATOR FIT TESTING
Publication number
20210316175
Publication date
Oct 14, 2021
TSI INCORPORATED
Daniel C. Bjorkquist
A62 - LIFE-SAVING FIRE-FIGHTING
Information
Patent Application
CONDENSATION PARTICLE COUNTER FALSE COUNT PERFORMANCE
Publication number
20200124515
Publication date
Apr 23, 2020
TSI Incorporated
Sreenath AVULA
G01 - MEASURING TESTING
Information
Patent Application
CONDENSATION PARTICLE COUNTER FALSE COUNT PERFORMANCE
Publication number
20180045636
Publication date
Feb 15, 2018
TSI Incorporated
Sreenath AVULA
G01 - MEASURING TESTING