ROGERS RADIO TUBES LTD innovation strategy

Patent filings in countries

#	Industry
#1	Electrical machinery and energy
#2	Machines
#3	Basic communication technologies
#4	Basic materials chemistry
#5	Medical technology

#	Technology
#1	Electric discharge tubes
#2	Unspecified technologies
#3	Resonators
#4	Coating compositions
#5	Unspecified technologies
#6	Electrotherapy
#7	Electrically-conductive connections
#8	Materials for miscellaneous applications
#9	Special electric heating or lighting
#10	Tuning resonant circuits

Publication	Filing date	Title
GB532213A	1939-08-22	Thermionic tube
US2183149A	1938-04-26	Thermionic tube
US2171670A	1937-07-30	Electrotherapeutic device
GB481713A	1937-06-29	Improvements in and relating to variable coupler for electrical systems
US2105818A	1937-06-22	Voltage indicating electron discharge tube
GB484511A	1936-12-23	Improvements in surface coatings of powdered material and in the method of applying the same
GB463241A	1936-10-23	Improvements in and relating to thermionic tubes
US2116080A	1936-09-03	Variable coupler for electrical systems
US2063188A	1936-05-20	Thermionic tube
US2094242A	1936-01-11	Coating and method of applying the same
GB450063A	1935-10-19	Improvements in and relating to dual purpose thermionic tubes
GB446606A	1935-04-26	Improvements in and relating to electron discharge devices
GB445738A	1935-04-04	Improvements in and relating to electron discharge devices
US2048023A	1934-11-06	Dual purpose thermionic tube
GB431019A	1934-10-26	Improvements in and relating to electron discharge devices
US2030931A	1934-04-26	Electron coupled thermionic oscillator
US2030930A	1934-04-04	Electron discharge device
US1982068A	1933-12-01	Combined rectifier and pentode
US1962873A	1933-08-11	Cathode ray oscillograph
GB417667A	1933-04-10	Improvements in automatic machines for treating glass bulbs such as electron tubes