Learn more

MCCULLOUGH FREDERICK S

Overview
  • Total Patents
    40
About

MCCULLOUGH FREDERICK S has a total of 40 patent applications. Its first patent ever was published in 1922. It filed its patents most often in United States and Canada. Its main competitors in its focus markets electrical machinery and energy, machines and telecommunications are LITTON CHARLES V, KING LAB INC and HYGRADE SYLVANIA CORP.

Patent filings in countries

World map showing MCCULLOUGH FREDERICK Ss patent filings in countries
# Country Total Patents
#1 United States 38
#2 Canada 2

Patent filings per year

Chart showing MCCULLOUGH FREDERICK Ss patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 Mccullough Frederick S 40

Latest patents

Publication Filing date Title
US1948122A Thermionic tube
US1996820A Base and socket structure for radio tubes
US1885125A Electrical discharge device
US1858676A Cathode
US1830802A Electrical discharge device
US1897761A Seal for vitreous articles
US1845310A Thermionic tube
US1889449A Thermionic tube
US1892066A Thermionic tube
US1806109A Amplification of electrical currents
US1607547A Wire and refractory article and method of making the same
US1777571A Coil and method of making the same
US1814759A Cathode structure
US1853281A Thermionic tube and circuits for the same
US1806108A Hot cathode device
US1761577A Method of manufacturing wire and porcelain elements
US1615022A Method of applying earthen material to metal
US1615023A Metal and porcelain article and method of manufacturing the same
US1759910A Circuits for thermionic tubes
US1943388A Cathode device