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AMERICAN SIGMA INC

Overview
  • Total Patents
    25
About

AMERICAN SIGMA INC has a total of 25 patent applications. Its first patent ever was published in 1986. It filed its patents most often in United States, Australia and WIPO (World Intellectual Property Organization). Its main competitors in its focus markets measurement, civil engineering and machines are GYSLING DANIEL L, NOREN ANDERS and KAY RAY SENSALL INC.

Patent filings per year

Chart showing AMERICAN SIGMA INCs patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 Randolph Gary 7
#2 Hungerford William G 7
#3 Kaiser Donald 6
#4 Dickinson William D 5
#5 Griffith Carl 5
#6 Dickinson W David 5
#7 Miller Donald 4
#8 Mirand James 4
#9 Baetz Charles N 4
#10 Kaiser Donald F 2

Latest patents

Publication Filing date Title
US5691914A Fluid flow measurement correcting system, and methods of constructing and utilizing same
US5633809A Multi-function flow monitoring apparatus with area velocity sensor capability
US5587926A Refrigerated fluid sampling apparatus and method with variable volume sampling system
US5506791A Multi-function flow monitoring apparatus with multiple flow sensor capability
US5299141A Automatic fluid monitoring and sampling apparatus and method
US5274721A Fiber optic system and method
US5172332A Automatic fluid sampling and monitoring apparatus and method
US5027902A Self-cycling pump apparatus and method
US5091863A Automatic fluid sampling and flow measuring apparatus and method
US5028213A Convertible and variable-length groundwater devices, components therefor, and methods of constructing and utilizing same
US4869371A Pump components for building pump, and methods of constructing and using same
US4749337A Reciprocating bladder pump, and methods of constructing and utilizing same
US4660607A Sensor controlled sampling apparatus and method
US4701107A Two stage pump sampler