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LOCKHART MARSHALL L

Overview
  • Total Patents
    19
About

LOCKHART MARSHALL L has a total of 19 patent applications. Its first patent ever was published in 1934. It filed its patents most often in United States and Canada. Its main competitors in its focus markets medical technology, machines and audio-visual technology are DCA DESIGN INTERNATIONAL LTD, FANGROW JR THOMAS F and DCA DESIGN INT LTD.

Patent filings in countries

World map showing LOCKHART MARSHALL Ls patent filings in countries
# Country Total Patents
#1 United States 16
#2 Canada 3

Patent filings per year

Chart showing LOCKHART MARSHALL Ls patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 Lockhart Marshall L 19

Latest patents

Publication Filing date Title
US2706479A Ampule
US2586069A Syringe assembly
US2586068A Syringe assembly
US2568346A Syringe structure
US2490447A Syringe assembly
US2514883A Hypodermic syringe
US2556331A Tubular ampoule closure
US2448898A Hypodermic needle
US2457313A Hypodermic syringe
US2574339A Hypodermic syringe
US2398544A Hypodermic injector
US2380534A Hypodermic injector
US2343195A Starting mechanism for internal combustion engines
US2322245A Ypodermic injector and method of use thereof
US2322244A Hypodermic injector
US2145449A Sound pick-up and amplifying apparatus
CA422309A Hypodermic injector
CA443162A Hypodermic syringe
CA446360A Hypodermic syringe