Dahu Qi

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Woodbury, MN, US

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Patents Grantslast 30 patents

Information Patent Grant
Seed sensor with lightpipe photodetect assembly
- Patent number 10,412,880
- Issue date Sep 17, 2019
- TSI, INCORPORATED
- Ronald W. Steffen
- A01 - AGRICULTURE FORESTRY ANIMAL HUSBANDRY HUNTING TRAPPING FISHING
Information Patent Grant
Seed sensor with lightpipe photodetect assembly
- Patent number 9,913,425
- Issue date Mar 13, 2018
- TSI, INCORPORATED
- Ronald W. Steffen
- G01 - MEASURING TESTING
Information Patent Grant
Apparatus and system for simultaneously measuring particle concentr...
- Patent number 9,880,097
- Issue date Jan 30, 2018
- TSI Incorporated
- Jim Evenstad
- G01 - MEASURING TESTING

Patents Applicationslast 30 patents

Information Patent Application
SEED SENSOR WITH LIGHTPIPE PHOTODETECT ASSEMBLY
- Publication number 20180359911
- Publication date Dec 20, 2018
- DICKEY-john Corporation
- Ronald W. Steffen
- G01 - MEASURING TESTING
Information Patent Application
SEED SENSOR WITH LIGHTPIPE PHOTODETECT ASSEMBLY
- Publication number 20160374263
- Publication date Dec 29, 2016
- DICKEY-john Corporation
- Ronald W. Steffen
- A01 - AGRICULTURE FORESTRY ANIMAL HUSBANDRY HUNTING TRAPPING FISHING
Information Patent Application
APPARATUS AND SYSTEM FOR CHARACTERIZING AN AEROSOL PARTICLE FLOW
- Publication number 20140354976
- Publication date Dec 4, 2014
- Jim Evenstad
- G01 - MEASURING TESTING