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JOHN EVANS SONS INC

Overview
  • Total Patents
    15
  • GoodIP Patent Rank
    187,104
  • Filing trend
    ⇩ 50.0%
About

JOHN EVANS SONS INC has a total of 15 patent applications. It decreased the IP activity by 50.0%. Its first patent ever was published in 1922. It filed its patents most often in United States, Canada and WIPO (World Intellectual Property Organization). Its main competitors in its focus markets civil engineering, machines and machine tools are SIMONSWERK GES MIT BESCHRÄNKTER HAFTUNG, TEIMUSU KK and MURA S R L.

Patent filings in countries

World map showing JOHN EVANS SONS INCs patent filings in countries

Patent filings per year

Chart showing JOHN EVANS SONS INCs patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 Kunz John R 14
#2 Kannengieszer Keith 2
#3 William Evans 1
#4 Kennengieszer Keith 1
#5 Kershaw Fred D 1

Latest patents

Publication Filing date Title
US2020109584A1 Mounting system for mounting a coil spring to a window frame in a sash counterbalance system
US10174537B1 Ribbon coil spring anchor mount system for use in a window counterbalance assembly
US10081972B1 Versatile and economic anchor mount for a coil spring in a window counterbalance assembly
US10415287B1 Counterbalance system for tilt-in window having a shielded brake shoe structure
US2016298368A1 System and method for inhibiting window sash drift
CA2851648A1 Brake shoe with contact posts that increase brake strength and improve the interconnection between the brake shoe and a counterbalance spring of a tilt-in window
CA2707563A1 System and method for improving the wear life of a brake shoe in the counterbalance system of a tilt-in window
CA2707562A1 Counterbalance system for a window having side loading sashes
US6857228B2 Counterbalance system for a tilt-in window
US6860066B2 Shoeless curl spring counterbalance system for a tilt-in window
US1520635A Leaf-spring-eyelet-forming machine