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WILLIAMSBURG STEEL PRODUCTS CO

Overview
  • Total Patents
    18
About

WILLIAMSBURG STEEL PRODUCTS CO has a total of 18 patent applications. Its first patent ever was published in 1965. It filed its patents most often in United States, Germany and France. Its main competitors in its focus markets packaging and shipping, civil engineering and machines are SEMATIC ITALIA SPA, ELEVATOR SUPPLIES CO INC and ALLEN THOMAS H.

Patent filings in countries

World map showing WILLIAMSBURG STEEL PRODUCTS COs patent filings in countries
# Country Total Patents
#1 United States 11
#2 Germany 2
#3 France 2
#4 Brazil 1
#5 Finland 1
#6 United Kingdom 1

Patent filings per year

Chart showing WILLIAMSBURG STEEL PRODUCTS COs patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 Halpern Ernst 13
#2 Ernst Halpern 4
#3 Kline Morris 3
#4 Kukke Gopal S 3
#5 Guslawski Waldemar 3
#6 Jack Schwartzberg 1

Latest patents

Publication Filing date Title
GB8405578D0 Elevator cab with hung panels
FR2497783A1 ELEVATOR CAB PLATFORM STRUCTURE
US4357993A Elevator cab construction
US3576092A Insert panel support structure
US3496676A Door seal construction
US3436864A Door support and guidance mechanism
US3407553A Elevator door frame construction
US3425162A Door hanger and track construction
US3382631A Facia and cover plate for elevator shaft construction
US3389504A Elevator door construction
US3431690A Adjustable support
US3365919A Latching arrangement
US3352074A Door frame fastening device