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Patent:US2588684


Patent:US 2588684
Title:Charge rate calculator for automatic telephony
Date:11.03.1952
Place:
Country:USA
Person:Frank Stehlik Rudolph
Company:Automatic Elect Lab
Internal Links:
Keywords:
Link to the patent office:
(without guarantee)
 US2588684 (espacenet),  US2588684 (uspto)


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Aus der Patentschrift US2588684