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HOFER DAVID L

Overview
  • Total Patents
    11
About

HOFER DAVID L has a total of 11 patent applications. Its first patent ever was published in 1938. It filed its patents most often in United States and Canada. Its main competitors in its focus markets civil engineering, machines and measurement are J B SALES INTERNAT LTD, PONCIN ANDRE and BEALES STEEL PROD.

Patent filings in countries

World map showing HOFER DAVID Ls patent filings in countries
# Country Total Patents
#1 United States 8
#2 Canada 3

Patent filings per year

Chart showing HOFER DAVID Ls patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 Hofer David L 11

Latest patents

Publication Filing date Title
US2754763A Control system for suction dredge relief valve
US2644400A Control circuit for emergency relief valve of a dredge
US2553918A Automatic flushing system for gauge pipes on suction dredges
US2572263A Suction dredge relief valve system
US2516386A Pump control system for suction dredges
US2276580A Velocity gauge
US2224295A Suction dredge pump control system
US2250021A Relief valve control
CA608110A Relief valve system for suction dredges
CA569487A Control system for suction dredge relief valve
CA506554A Suction dredge relief valve system