STROMBERG CARLSON TELEPHONE innovation strategy

Patent filings in countries

#	Industry
#1	Telecommunications
#2	Audio-visual technology
#3	Electrical machinery and energy
#4	Machines
#5	Basic communication technologies

#	Technology
#1	Telephonic communication
#2	Selecting
#3	Electric switches
#4	Loudspeakers and microphones
#5	Tuning resonant circuits
#6	Unspecified technologies
#7	Shaping of plastics
#8	Special information storage
#9	Transmission
#10	Amplification control

Publication	Filing date	Title
US2325770A	1943-02-18	Electrical shielding and locking means for thermionic tubes
US2395966A	1943-01-21	Plan position indicator system
US2362448A	1942-09-26	Crossbar switch system
US2351584A	1942-08-18	Three-dimensional crossbar switch system
US2325877A	1942-03-11	Automatic telephone system
US2403245A	1942-02-23	Modulation system
US2362692A	1942-02-12	Communication system
US2344634A	1942-01-08	Telephone intercept system
US2320899A	1941-09-08	Telephone ringer
US2320885A	1941-03-21	Signaling system
US2315378A	1940-09-13	Automatic telephone system
US2320877A	1940-09-07	Phonograph
US2261822A	1940-03-13	Telephone switchboard
US2261809A	1939-12-05	Switch key
US2259907A	1939-11-03	Sound reproducing system
US2241158A	1939-09-21	Automatic telephone system
US2241126A	1939-07-27	Retracting mechanism for switchboards and the like
US2241145A	1938-12-24	Signaling system
US2232399A	1938-12-13	Combined television and radio receiving system
US2241157A	1938-11-10	Remote control signaling system