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HILLGREN CARL A

Overview
  • Total Patents
    11
About

HILLGREN CARL A has a total of 11 patent applications. Its first patent ever was published in 1939. It filed its patents most often in United States. Its main competitors in its focus markets machines and civil engineering are HOLLYMADE HARDWARE MFG COMPANY, DIALOC CORP and NAT BRASS CO.

Patent filings in countries

World map showing HILLGREN CARL As patent filings in countries
# Country Total Patents
#1 United States 11

Patent filings per year

Chart showing HILLGREN CARL As patent filings per year from 1900 to 2020

Focus industries

# Industry
#1 Machines
#2 Civil engineering

Top inventors

# Name Total Patents
#1 Hillgren Carl A 11

Latest patents

Publication Filing date Title
US3087324A Combination dead lock and spring latch
US2723874A Privacy lock
US2683367A Latch construction for cylinder locks
US2676051A Latch spindle construction
US2662386A Door lock
US2662388A Door lock
US2605124A Latch
US2533582A Lock
US2544959A Door lock
US2403597A Door lock
US2219740A Door lock