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ENVIROTEST SYSTEMS CORP

Overview
  • Total Patents
    43
About

ENVIROTEST SYSTEMS CORP has a total of 43 patent applications. Its first patent ever was published in 1993. It filed its patents most often in United States, Australia and Canada. Its main competitors in its focus markets measurement, environmental technology and computer technology are ENVIROTEST SYSTEMS INC, YUASA SYSTEM KIKI KK and SUZHOU ZHONGQI TESTING TECH SERVICE CO LTD.

Patent filings per year

Chart showing ENVIROTEST SYSTEMS CORPs patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 Jack Michael D 13
#2 Didomenico John D 12
#3 Rendahl Craig S 12
#4 Nelson David R 10
#5 Peterson Jay C 8
#6 Stedman Donald H 8
#7 Gray Michael N 7
#8 Johnson James A 7
#9 Bishop Gary A 7
#10 Didomenico John 5

Latest patents

Publication Filing date Title
US6723989B1 Remote emissions sensing system and method with a composite beam of IR and UV radiation that is not split for detection
US6230087B1 Vehicular running loss detecting system
EP1153281A1 Remote vehicle emission sensing device with single detector
AU2395700A Data processing and validation
AU2356300A Exhaust opacity measuring device
CN1338044A Exhaust opacity measuring device
AU6147199A Remote emissions sensing system with improved no chi detection
US6307201B1 Method and apparatus for selecting a filter for a remote sensing device
US5831267A Method and apparatus for remote measurement of exhaust gas
US5797682A Device and method for measuring temperture of vehicle exhaust
US5726450A Unmanned integrated optical remote emissions sensor (RES) for motor vehicles
US5812249A Speed and acceleration monitoring device using visible laser beams
US5719396A Systems and methods for determining compliance of moving vehicles with emission-concentration standards
CA2173073A1 Method and system for diagnosing and reporting failure of a vehicle emission test
US5671158A Apparatus and method for effecting wireless discourse between computer and technician in testing motor vehicle emission control systems
US5644133A Remote vehicle emission analyzer with light conveyance to detectors through fiber optic light tubes
US5465614A Apparatus and method for non-intrusive testing of a motor vehicle canister purge system
US5425266A Apparatus and method for non-intrusive testing of motor vehicle evaporative fuel systems
US5414626A Apparatus and method for capturing, storing, retrieving, and displaying the identification and location of motor vehicle emission control systems
US5371367A Remote sensor device for monitoring motor vehicle exhaust systems