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LOGSDON DUANE D

Overview
  • Total Patents
    35
About

LOGSDON DUANE D has a total of 35 patent applications. Its first patent ever was published in 1968. It filed its patents most often in United States and Canada. Its main competitors in its focus markets civil engineering, mechanical elements and machines are PLANNJA SIBA AB, MARLEY EXTRUSIONS and CUPIT GEORGE M.

Patent filings in countries

World map showing LOGSDON DUANE Ds patent filings in countries
# Country Total Patents
#1 United States 21
#2 Canada 14

Patent filings per year

Chart showing LOGSDON DUANE Ds patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 Logsdon Duane D 35

Latest patents

Publication Filing date Title
CA1321079C Washing machine connection boxes
US4768560A Pipe plugs
US4742585A Tub box
US4768741A Pipe hangers
US4611626A Fluid control valve
US4564249A Miniature washing machine box
CA1198721A Pipe positioning clamp
CA1201698A Pipe hanger capable of totally encircling a pipe
US4487690A Sump or flush installable roof drain
US4484424A Roof vent
CA1179392A Drain grate with adjustable weirs
US4442994A Pipe hanger capable of totally encircling a pipe
US4400272A Drain grate with adjustable weirs
CA1170686A Expansion coupling for large diameter plastic pipes
US4400920A Apparatus for securing pipe
US4350372A Expansion coupling for large diameter plastic pipes
US4088149A Check valve structure for use in drains
US4010578A Roof flashing structure
CA991567A Washing machine connection structure
CA991569A Pipe protector