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.)
Expired
Application number
Inventor
Isidore Bernard Birnbaum
Joseph Berliner
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Individual
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Individual
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Publication of GB190223753ApublicationCriticalpatent/GB190223753A/en
23,753. Birnbaum. I. B., and Berliner, J. Oct. 30. Telephones.-Relates to hand telephone combination apparatus. The switch lever 2 is provided with an extension. which completely covers the bell contact 1. The bell contact is broken and the talking-circuit completed w h e n the lever is pressed.
GB190223753D1902-10-301902-10-30Improvements in and relating to Telephones.
ExpiredGB190223753A
(en)