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PARKER JOHN J

Overview
  • Total Patents
    53
About

PARKER JOHN J has a total of 53 patent applications. Its first patent ever was published in 1920. It filed its patents most often in United States, Canada and Germany. Its main competitors in its focus markets machines, machine tools and measurement are HOKKAIDO SUMIDEN SEIMITSU KK, JUD AG KLEMMWERKZEUGE and IHARA MINORU.

Patent filings in countries

World map showing PARKER JOHN Js patent filings in countries
# Country Total Patents
#1 United States 32
#2 Canada 20
#3 Germany 1

Patent filings per year

Chart showing PARKER JOHN Js patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 Parker John J 52
#2 Morawski London T 41
#3 Baldi Alfonso L 1

Latest patents

Publication Filing date Title
US2009280054A1 Composition and process for the displacement of hydrogen from water under standard temperature and pressure conditions
US3490778A Collet chuck
US3216733A Collet chuck
US3191952A Diaphragm chuck
US3176997A Fixture for supporting ring gears
US2865643A Edge clamping chuck
US2890056A Ball actuated expansible arbor
US2877021A Splined work piece holder
US2879682A Splined article holder using ball cams
US2878707A Work-holder for splined articles with herringbone cams
US2877022A Expansible arbor with segmental sleeves
US2879067A Chuck for splined articles
US2878706A Clamping arbor for splines
US2879068A Cam-operated work-holder for spliner articles
US2831694A Expandable arbor
US2854240A Radial jaw chuck
US2829897A Chuck for threaded articles
US2880005A Dual spline chuck
US2806705A Chuck for supporting a plurality of work pieces
US2852262A Twist type chuck