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WHITMAN STEWART C

Overview
  • Total Patents
    14
About

WHITMAN STEWART C has a total of 14 patent applications. Its first patent ever was published in 1931. It filed its patents most often in United States and Canada. Its main competitors in its focus markets audio-visual technology, electrical machinery and energy and consumer goods are RANGABE ALEXANDER RIZO, FIDELITY FILMS LTD and JOSEPH ENGL DR.

Patent filings in countries

World map showing WHITMAN STEWART Cs patent filings in countries
# Country Total Patents
#1 United States 13
#2 Canada 1

Patent filings per year

Chart showing WHITMAN STEWART Cs patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 Whitman Stewart C 14

Latest patents

Publication Filing date Title
US2137189A Electrical discharge tube hair waving device
US2137188A Piezoelectric crystal mirror system for sound recording
US2087366A Electrodynamic recording and reproducing driving unit
US2012797A Piezo-electric crystal reflecting mirror sound recording system
US2059504A Apparatus and method for recording sound on film
US2068212A Irradiating mechanical refrigerator
US1963480A Reduction dubbing and recording of sound on film
US1982558A Automatic high frequency carrier control
US2003410A High frequency gaseous conduction lamp
US1989836A Optical system for recording sound on film or reproducing the same
US1999951A Apparatus for recording sound on film
US1996731A Light source for recording sound on film
US2011743A Recording lamp
CA352456A Gaseous conduction lamp