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CONCEALED DOOR CHECK COMPANY

Overview
  • Total Patents
    16
About

CONCEALED DOOR CHECK COMPANY has a total of 16 patent applications. Its first patent ever was published in 1908. It filed its patents most often in United States and Canada. Its main competitors in its focus markets civil engineering and machines are WINTER RUDOLPH G, WRIGHT PRODUCTS INC and GOSERUD CHESTER O.

Patent filings in countries

World map showing CONCEALED DOOR CHECK COMPANYs patent filings in countries
# Country Total Patents
#1 United States 15
#2 Canada 1

Patent filings per year

Chart showing CONCEALED DOOR CHECK COMPANYs patent filings per year from 1900 to 2020

Focus industries

# Industry
#1 Civil engineering
#2 Machines

Top inventors

# Name Total Patents
#1 Eastman Floyd K 8
#2 Nordqvist Per Erik 7
#3 Simmons Herbert G 1

Latest patents

Publication Filing date Title
US1850229A Doorcheck
US1757261A Doorcheck
US1755288A Doorcheck
US1683713A Doorcheck
US1657528A Doorcheck strap
US1646580A Doorcheck
US1536391A Doorcheck
US1535113A Vehicle doorcheck
US1041854A Door check and closer.
US1041856A Door-check mechanism.
US1041853A Door-check.
US1062297A Regulating device for door checks and closers.
US1041855A Valve mechanism for door-checks.
US1041857A Concealed door-check.
US955674A Device for preventing doors from sagging.
CA277339A Door check for vehicles