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BLETCHER RALPH E

Overview
  • Total Patents
    15
About

BLETCHER RALPH E has a total of 15 patent applications. Its first patent ever was published in 1917. It filed its patents most often in United States and Canada. Its main competitors in its focus markets machines, mechanical elements and civil engineering are RALPH E BLETCHER, ZUCCHETTI RUBINETTERIA SPA and HUANG LI-CHEN.

Patent filings in countries

World map showing BLETCHER RALPH Es patent filings in countries
# Country Total Patents
#1 United States 11
#2 Canada 4

Patent filings per year

Chart showing BLETCHER RALPH Es patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 Bletcher Ralph E 13
#2 Ward Irving A 7
#3 Bucknell Ernest H 6
#4 Rauh Jack K 2
#5 Radecki Tony 1
#6 Bletcher James H 1

Latest patents

Publication Filing date Title
CA977010A Combined aerator-spray assembly
CA966390A Diaphragm spout assembly
US2867230A Diverter valve for a shower installation
US2832643A Flow regulator
US2795462A Shower head
US2875702A Combination fixture
US2789013A Self closing valve
US2795460A Detergent dispersing device
US2269901A Shower head
US1878097A Combined mixing and diverting valve
US1807081A Valve mechanism
US1625589A Silencer or flow regulator for valves, faucets, and the like
US1251956A Silencer.
CA534170A Detergent dispensing device
CA452585A Pressure control fitting