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David A. FISCHER
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Ann Arbor, MI, US
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Patents Grants
last 30 patents
Information
Patent Grant
Liquid level sensor system
Patent number
11,560,786
Issue date
Jan 24, 2023
Graco Minnesota Inc.
John F. Schaupp
E21 - EARTH DRILLING MINING
Information
Patent Grant
Pneumatic landfill pump cycle counter
Patent number
11,448,238
Issue date
Sep 20, 2022
Graco Minnesota Inc.
Steven R. Wells
F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
Information
Patent Grant
Landfill gas wellhead cap assembly
Patent number
10,307,805
Issue date
Jun 4, 2019
Q.E.D. Environmental Systems, Inc.
Kenneth L. Niehaus
B09 - DISPOSAL OF SOLID WASTE RECLAMATION OF CONTAMINED SOIL SOIL
Information
Patent Grant
Air stripper system and method
Patent number
10,272,356
Issue date
Apr 30, 2019
Q.E.D. Environmental Systems, Inc.
David A. Fischer
C02 - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
Information
Patent Grant
Devices and methods for landfill gas well monitoring and control
Patent number
10,144,043
Issue date
Dec 4, 2018
Q.E.D. Environmental Systems, Inc.
David A. Fischer
E21 - EARTH DRILLING MINING
Information
Patent Grant
System and method for distributed control of multiple wellheads
Patent number
10,053,955
Issue date
Aug 21, 2018
Q.E.D. Environmental Systems, Inc.
David A. Fischer
B09 - DISPOSAL OF SOLID WASTE RECLAMATION OF CONTAMINED SOIL SOIL
Information
Patent Grant
Devices and methods for landfill gas well monitoring and control
Patent number
10,029,291
Issue date
Jul 24, 2018
Q.E.D. Environmental Systems, Inc.
David A. Fischer
B09 - DISPOSAL OF SOLID WASTE RECLAMATION OF CONTAMINED SOIL SOIL
Information
Patent Grant
Devices and methods for landfill gas well monitoring and control
Patent number
9,062,536
Issue date
Jun 23, 2015
Graco Minnesota Inc.
David A. Fischer
B09 - DISPOSAL OF SOLID WASTE RECLAMATION OF CONTAMINED SOIL SOIL
Information
Patent Grant
Device for detecting water in product-only pump flow stream
Patent number
7,347,255
Issue date
Mar 25, 2008
QED Environmental Systems, Inc.
David A. Fischer
F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
Information
Patent Grant
Bladder-type sampling pump controller
Patent number
6,508,310
Issue date
Jan 21, 2003
QED Environmental Systems, Inc.
David Mioduszewski
F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
Information
Patent Grant
Method and apparatus for measuring groundwater levels
Patent number
6,456,201
Issue date
Sep 24, 2002
QED Environmental Systems, Inc.
David Mioduszewski
E21 - EARTH DRILLING MINING
Information
Patent Grant
Method for analyzing purge water
Patent number
6,415,659
Issue date
Jul 9, 2002
QED Environmental Systems, Inc.
David Mioduszewski
E21 - EARTH DRILLING MINING
Information
Patent Grant
Dual pump floating layer recovery apparatus
Patent number
5,301,749
Issue date
Apr 12, 1994
QED Environmental Systems, Inc.
David A. Fischer
B09 - DISPOSAL OF SOLID WASTE RECLAMATION OF CONTAMINED SOIL SOIL
Information
Patent Grant
Vented packer for sampling well
Patent number
5,259,450
Issue date
Nov 9, 1993
QED Environmental Systems, Inc.
David Fischer
E21 - EARTH DRILLING MINING
Information
Patent Grant
Sampling pump with packer
Patent number
5,238,060
Issue date
Aug 24, 1993
OED Environmental Systems, Inc.
K. Lynn Niehaus
E21 - EARTH DRILLING MINING
Information
Patent Grant
Recovery and control system for leachate collection
Patent number
4,727,936
Issue date
Mar 1, 1988
QED Environmental Systems, Inc.
David Mioduszewski
E21 - EARTH DRILLING MINING
Patents Applications
last 30 patents
Information
Patent Application
LIQUID LEVEL SENSOR SYSTEM
Publication number
20210199001
Publication date
Jul 1, 2021
Q.E.D. ENVIRONMENTAL SYSTEMS, INC.
John F. SCHAUPP
G01 - MEASURING TESTING
Information
Patent Application
FLUID PUMP FOR GROUNDWATER WELLS WITH CYCLE COUNTER
Publication number
20200334515
Publication date
Oct 22, 2020
Q.E.D. ENVIRONMENTAL SYSTEMS, INC.
John F. SCHAUPP
G06 - COMPUTING CALCULATING COUNTING
Information
Patent Application
POPPET VALVE FOR FLUID PUMP
Publication number
20200309114
Publication date
Oct 1, 2020
Q.E.D. ENVIRONMENTAL SYSTEMS, INC.
John F. SCHAUPP
F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
Information
Patent Application
PNEUMATIC LANDFILL PUMP CYCLE COUNTER
Publication number
20200263706
Publication date
Aug 20, 2020
Steven R. Wells
G01 - MEASURING TESTING
Information
Patent Application
Air Stripper System And Method
Publication number
20170304743
Publication date
Oct 26, 2017
Q.E.D. ENVIRONMENTAL SYSTEMS, INC.
David A. FISCHER
B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information
Patent Application
LANDFILL GAS WELLHEAD CAP ASSEMBLY
Publication number
20170216894
Publication date
Aug 3, 2017
Q.E.D. ENVIRONMENTAL SYSTEMS, INC.
Kenneth L. NIEHAUS
B09 - DISPOSAL OF SOLID WASTE RECLAMATION OF CONTAMINED SOIL SOIL
Information
Patent Application
SYSTEM AND METHOD FOR DISTRIBUTED CONTROL OF MULTIPLE WELLHEADS
Publication number
20170122065
Publication date
May 4, 2017
Q.E.D. ENVIRONMENTAL SYSTEMS, INC.
David A. FISCHER
B09 - DISPOSAL OF SOLID WASTE RECLAMATION OF CONTAMINED SOIL SOIL
Information
Patent Application
Devices And Methods For Landfill Gas Well Monitoring And Control
Publication number
20150275632
Publication date
Oct 1, 2015
Graco Minnesota Inc.
David A. FISCHER
B09 - DISPOSAL OF SOLID WASTE RECLAMATION OF CONTAMINED SOIL SOIL
Information
Patent Application
Devices And Methods For Landfill Gas Well Monitoring And Control
Publication number
20150226045
Publication date
Aug 13, 2015
Graco Minnesota Inc.
David A. FISCHER
B09 - DISPOSAL OF SOLID WASTE RECLAMATION OF CONTAMINED SOIL SOIL
Information
Patent Application
DEVICES AND METHODS FOR LANDFILL GAS WELL MONITORING AND CONTROL
Publication number
20140182846
Publication date
Jul 3, 2014
Q.E.D. ENVIRONMENTAL SYSTEMS, INC.
David A. Fischer
B09 - DISPOSAL OF SOLID WASTE RECLAMATION OF CONTAMINED SOIL SOIL
Information
Patent Application
Device for detecting water in product-only pump flow stream
Publication number
20050211432
Publication date
Sep 29, 2005
QED Environmental Systems, Inc.
David A. Fischer
F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...