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Automatic Telephone Manufacturing Co Ltd

Automatic

Active Patents

0

Total Holdings

4

Patent Holdings

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Patent No.	Title	Status	Filing Date	Grant Date	Claims	Actions
GB197503A	Improvements in or relating to the transmission of telephon…	Expired / Lapsed	1922-04-12	—	0	Details
US1850181A	Magnet core	Expired / Lapsed	1930-01-30	1932-03-22	0	Details
US1594727A	Multiplex telegraph system	Expired / Lapsed	1924-05-21	1926-08-03	0	Details
US1516646A	Electric resistance material and process for manufacturing …	Expired / Lapsed	1921-07-25	1924-11-25	0	Details