AU163658B2 - Improvements in or relating to four-wire circuits for use in single-current-double-current telegraphy transmission system
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Improvements in or relating to four-wire circuits for use in single-current-double-current telegraphy transmission system
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Koninklijke Philips NV
Original Assignee
Philips Gloeilampenfabrieken NV
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Publication date
Application filed by Philips Gloeilampenfabrieken NVfiledCriticalPhilips Gloeilampenfabrieken NV
Application grantedgrantedCritical
Publication of AU2703054ApublicationCriticalpatent/AU2703054A/en
Publication of AU163658B2publicationCriticalpatent/AU163658B2/en
AU27030/54A1954-04-28Improvements in or relating to four-wire circuits for use in single-current-double-current telegraphy transmission system
ExpiredAU163658B2
(en)