4. Electric power conversion systems
  5. Current conversion
  6. With condition responsive means to control the output...

Isaac Ferstenberg

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Backslope regulator system

Electric power conversion systems – Current conversion – With condition responsive means to control the output...
Reexamination Certificate

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Self-amplified loudspeaker

Recording – communication – or information retrieval equipment – Video or audio transmission – recording or playback equipment – Speaker or housing therefor
Design Patent

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Profile ID: LFUS-PAI-P-2470321

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