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O S WALKER CO INC

Overview
  • Total Patents
    17
About

O S WALKER CO INC has a total of 17 patent applications. Its first patent ever was published in 1927. It filed its patents most often in United States, Canada and United Kingdom. Its main competitors in its focus markets machine tools, electrical machinery and energy and machines are WALKER O S CO INC, STARRAGHECKERT GMBH and CUPLER JOHN A.

Patent filings in countries

World map showing O S WALKER CO INCs patent filings in countries
# Country Total Patents
#1 United States 15
#2 Canada 1
#3 United Kingdom 1

Patent filings per year

Chart showing O S WALKER CO INCs patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 Beechlyn John T 8
#2 Tracy Howard E 3
#3 Smith Clayton O 2
#4 Gotha Daniel F 1
#5 Beechlyn John-T 1
#6 Briggs Charles D 1

Latest patents

Publication Filing date Title
US2388737A Fabrication of electric chucks
US2435735A Magnetic chuck
US2359293A Permanent magnetic chuck
US2327748A Universal work-holding plate for magnetic chucks
US2360928A Permanent magnet chuck
US2347023A Permanent magnet chuck
US2333230A Magnetic chuck
US2268011A Permanent magnetic chuck
US2240749A Alternating current demagnetizer
US2223866A Magnetic speed changer
US2132885A Magnetic chuck
US2106233A Portable demagnetizer
US2131035A Magnetic speed changer
US1673719A Angular magnetic chuck
US1704448A Multiple magnetic chuck
CA417603A Magnetic chuck work-holding plate