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Loveland, CO, US
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Patents Grants
last 30 patents
Information
Patent Grant
Ultrasonic transducer
Patent number
D457491
Issue date
May 21, 2002
American Sigma, Inc.
Donald Kaiser
D13 - Equipment for production, distribution, or transformation of energy
Information
Patent Grant
Fluid flow measurement correcting system and methods of constructin...
Patent number
6,208,943
Issue date
Mar 27, 2001
American Sigma, Inc.
Gary L. Randolph
G01 - MEASURING TESTING
Information
Patent Grant
Fluid flow measurement correcting system, and methods of constructi...
Patent number
5,691,914
Issue date
Nov 25, 1997
American Sigma, Inc.
Gary Randolph
G01 - MEASURING TESTING
Information
Patent Grant
Multi-function flow monitoring apparatus with area velocity sensor...
Patent number
5,633,809
Issue date
May 27, 1997
American Sigma, Inc.
Richard Wissenbach
E03 - WATER SUPPLY SEWERAGE
Information
Patent Grant
Refrigerated fluid sampling apparatus and method with variable volu...
Patent number
5,587,926
Issue date
Dec 24, 1996
American Sigma, Inc.
Francis Chiu
G02 - OPTICS
Information
Patent Grant
Multi-function flow monitoring apparatus with multiple flow sensor...
Patent number
5,506,791
Issue date
Apr 9, 1996
American Sigma, Inc.
William G. Hungerford
G02 - OPTICS
Information
Patent Grant
Automatic fluid monitoring and sampling apparatus and method
Patent number
5,299,141
Issue date
Mar 29, 1994
American Sigma, Inc.
William G. Hungerford
G02 - OPTICS
Information
Patent Grant
Fiber optic system and method
Patent number
5,274,721
Issue date
Dec 28, 1993
American Sigma, Inc.
William D. Dickinson
G02 - OPTICS
Information
Patent Grant
Automatic fluid sampling and monitoring apparatus and method
Patent number
5,172,332
Issue date
Dec 15, 1992
American Sigma, Inc.
William G. Hungerford
E03 - WATER SUPPLY SEWERAGE
Information
Patent Grant
Automatic fluid sampling and flow measuring apparatus and method
Patent number
5,091,863
Issue date
Feb 25, 1992
American Sigma, Inc.
William G. Hungerford
E03 - WATER SUPPLY SEWERAGE
Information
Patent Grant
Self-cycling pump apparatus and method
Patent number
5,027,902
Issue date
Jul 2, 1991
American Sigma, Inc.
William D. Dickinson
E21 - EARTH DRILLING MINING
Information
Patent Grant
Convertible and variable-length groundwater devices, components the...
Patent number
5,028,213
Issue date
Jul 2, 1991
American Sigma, Inc.
William D. Dickinson
E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
Information
Patent Grant
Pump components for building pump, and methods of constructing and...
Patent number
4,869,371
Issue date
Sep 26, 1989
American Sigma, Inc.
William D. Dickinson
E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
Information
Patent Grant
Reciprocating bladder pump, and methods of constructing and utilizi...
Patent number
4,749,337
Issue date
Jun 7, 1988
American Sigma, Inc.
W. David Dickinson
F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
Information
Patent Grant
Two stage pump sampler
Patent number
4,701,107
Issue date
Oct 20, 1987
American Sigma, Inc.
W. David Dickinson
E21 - EARTH DRILLING MINING
Information
Patent Grant
Sensor controlled sampling apparatus and method
Patent number
4,660,607
Issue date
Apr 28, 1987
American Sigma, Inc.
Carl D. Griffith
F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
Patents Applications
last 30 patents
Trademark
last 30 trademarks
Information
Trademark
75121407 - VISION
Serial number
75121407
Registration number
2052822
Filing date
Apr 5, 1996
American Sigma, Inc.
9 - Scientific, nautical, surveying, photographic, cinematographic, optical, weighing, measuring, signalling, checking (supervision), life-saving and teaching apparatus and instruments
Information
Trademark
74730444 - INSIGHT
Serial number
74730444
Registration number
2039966
Filing date
Sep 18, 1995
American Sigma, Inc.
9 - Scientific, nautical, surveying, photographic, cinematographic, optical, weighing, measuring, signalling, checking (supervision), life-saving and teaching apparatus and instruments
Information
Trademark
74730443 - ON SITE
Serial number
74730443
Filing date
Sep 18, 1995
American Sigma, Inc.
9 - Scientific, nautical, surveying, photographic, cinematographic, optical, weighing, measuring, signalling, checking (supervision), life-saving and teaching apparatus and instruments
Information
Trademark
73704813 - STREAMLINE
Serial number
73704813
Registration number
1519615
Filing date
Jan 11, 1988
AMERICAN SIGMA, INC.
9 - Scientific, nautical, surveying, photographic, cinematographic, optical, weighing, measuring, signalling, checking (supervision), life-saving and teaching apparatus and instruments
Information
Trademark
73670511 - STREAMLINE
Serial number
73670511
Registration number
1520603
Filing date
Jul 6, 1987
AMERICAN SIGMA, INC.
9 - Scientific, nautical, surveying, photographic, cinematographic, optical, weighing, measuring, signalling, checking (supervision), life-saving and teaching apparatus and instruments
Information
Trademark
73608759 - GEOGUARD
Serial number
73608759
Registration number
1429098
Filing date
Jul 10, 1986
AMERICAN SIGMA, INC.
9 - Scientific, nautical, surveying, photographic, cinematographic, optical, weighing, measuring, signalling, checking (supervision), life-saving and teaching apparatus and instruments
Information
Trademark
73608760 - GEOGUARD
Serial number
73608760
Registration number
1429099
Filing date
Jul 10, 1986
AMERICAN SIGMA, INC.
9 - Scientific, nautical, surveying, photographic, cinematographic, optical, weighing, measuring, signalling, checking (supervision), life-saving and teaching apparatus and instruments