Learn more

MACGRIFF JACK E

Overview
  • Total Patents
    11
About

MACGRIFF JACK E has a total of 11 patent applications. Its first patent ever was published in 1952. It filed its patents most often in United States and Canada. Its main competitors in its focus markets electrical machinery and energy, measurement and optics are TOKYO KEISO KABUSHIKI KAISHA, OVAL ENG CO LTD and JIANGSU JINYUMING ELECTRONIC CO LTD.

Patent filings in countries

World map showing MACGRIFF JACK Es patent filings in countries
# Country Total Patents
#1 United States 9
#2 Canada 2

Patent filings per year

Chart showing MACGRIFF JACK Es patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 Macgriff Jack E 11
#2 Bacon Marilyn L 3

Latest patents

Publication Filing date Title
US3283069A Electron emission control tube and method
US3323131A Image control device with means to precharge the printing gap
US3242261A Electron emission control tube
US3056136A Image control device and method of printing
US2934673A Image control tube
US2882365A Fluid level indicator
US2894092A Fluid level indicator
US2777030A Fluid level indicator
US2771336A Image control tube and method of printing
CA752081A Electron emission control tube
CA666315A Image control device and method of printing