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Telefonaktiebolaget LM Ericsson AB
Telefonakt
Active Patents
0
Total Holdings
3
Patent Holdings
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Patent No.
Title
Status
Filing Date
Grant Date
Claims
Actions
US2725474A
Oscillation circuit with superconductor
Expired / Lapsed
1950-08-04
1955-11-29
0
Details
US2666884A
Rectifier and converter using superconduction
Expired / Lapsed
1950-08-04
1954-01-19
0
Details
US2583848A
Switching device for the setting of crossbar switches by me…
Expired / Lapsed
1947-05-23
1952-01-29
0
Details