ARTHUR J. SCHWIDDER

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NEW BRIGHTON, MN, US

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Patents Grantslast 30 patents

Information Patent Grant
Falling head infiltrometer apparatus
- Patent number 11,353,391
- Issue date Jun 7, 2022
- UPSTREAM TECHNOLOGIES INC
- Arthur J. Schwidder
- G01 - MEASURING TESTING
Information Patent Grant
Infiltrometer apparatus and related methods of use
- Patent number 10,739,242
- Issue date Aug 11, 2020
- UPSTREAM TECHNOLOGIES, INC.
- Arthur J. Schwidder
- G01 - MEASURING TESTING

Patents Applicationslast 30 patents

Information Patent Application
FALLING HEAD INFILTROMETER APPARATUS
- Publication number 20200319076
- Publication date Oct 8, 2020
- UPSTREAM TECHNOLOGIES, INC.
- ARTHUR J. SCHWIDDER
- G01 - MEASURING TESTING
Information Patent Application
INFILTROMETER APPARATUS AND RELATED METHODS OF USE
- Publication number 20190033196
- Publication date Jan 31, 2019
- UPSTREAM TECHNOLOGIES, INC.
- ARTHUR J. SCHWIDDER
- G01 - MEASURING TESTING