SUDDEUTSCHE APP FABRIK G M B H innovation strategy

Patent filings in countries

#	Industry
#1	Semiconductors
#2	Electrical machinery and energy
#3	Machines
#4	Telecommunications
#5	Environmental technology
#6	Control
#7	Materials and metallurgy

#	Technology
#1	Semiconductor devices
#2	AC and DC conversion devices
#3	Unspecified technologies
#4	Capacitors and switching devices
#5	Selecting
#6	Reduction of greenhouse gas emissions
#7	Magnets and transformers
#8	Circuits for supplying electric power
#9	Non-metallic elements
#10	Systems for regulating electrical variables

Publication	Filing date	Title
GB682105A	1950-04-05	Method of making surface-type and point-type rectifiers and crystal-amplifier layers from semiconductor material
US2285424A	1939-11-28	Method of manufacturing foillike layers
US2203328A	1939-08-02	Manufacturing selenium valve disks for rectifiers and photoelectric cells
US2226716A	1939-07-01	Photoelectric cell
US2197497A	1939-06-07	Selenium rectifier and method of producing same
US2241908A	1939-05-31	Rectifier device
US2213279A	1939-04-29	Method of producing selenium disks for rectifiers and photoelectric cells
US2207234A	1939-03-14	Voltage regulating device
US2226715A	1939-03-08	Rectifier device
US2259372A	1938-06-16	Light sensitive device
US2196677A	1938-04-26	Converter
US2130384A	1938-02-01	Rectifier
US2156054A	1937-07-24	Dry rectifier
US2173905A	1937-05-28	Voltage-compensating transformer
US2217402A	1935-09-19	Photocell
CA393423A	None	Selenium rectifier