Learn more

DURO TEST CORP

Overview
  • Total Patents
    309
About

DURO TEST CORP has a total of 309 patent applications. Its first patent ever was published in 1938. It filed its patents most often in United States, Canada and United Kingdom. Its main competitors in its focus markets electrical machinery and energy, machines and environmental technology are ALEXANDER JUST, VITRITE WORKS NV and EDISON THOMAS ALVA.

Patent filings per year

Chart showing DURO TEST CORPs patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 Thorington Luke 33
#2 Walsh Peter 28
#3 Shurgan Joel 21
#4 Trutner Donald G 18
#5 Thouret Wolfgang E 17
#6 Northrop Donald P 17
#7 Fontana Raymond P 17
#8 Walsh Peter J 14
#9 Kaufman Rudolph 13
#10 Thouret Wolfgang 13

Latest patents

Publication Filing date Title
US6072284A Three-way compact fluorescent lamp ballast and lamp holder incorporating same
US5498924A Fluorescent lamp capable of operating on multiple ballast system
US5122710A Rare earth phosphor blends for fluorescent lamp using four to five phosphors
US4891550A Phosphor blend for broad spectrum fluorescent lamp
US4924368A Fluorescent lamp with protective shield
JPH01143133A Fluorescent lamp
US4816714A Corner cube array for use in incandescent lamps
US4734616A Fluoresent lamp with double cathode and probe
US4714857A Infrared reflective lamp with envelope having straight sections
US4758173A Socket adaptor for fluorescent lamp
US4745323A Compact fluorescent lamp with outer envelope
US4707632A Energy-efficient lamp
CA1247204A Socket extender for fluorescent lamps
AU3615884A Variable index film for transparent heat mirrors
US4649319A Gas discharge lamp starter
GB8412250D0 Incandescent lamps
ES8503165A1 Energy-efficiency incandescent lamp for precision optics
IL71453D0 Energy efficient incandescent lamp with improved filament characteristics
IT8420357D0 Energy-efficiency incandescent lamp for precision optics
CA1247190A Energy efficient incandescent lamp with improved filament characteristics