GB191203097A - Intercommunication Telephone Systems. - Google Patents

Intercommunication Telephone Systems.

Info

Publication number
GB191203097A
GB191203097A GB191203097DA GB191203097A GB 191203097 A GB191203097 A GB 191203097A GB 191203097D A GB191203097D A GB 191203097DA GB 191203097 A GB191203097 A GB 191203097A
Authority
GB
United Kingdom
Prior art keywords
contacts
station
magnet
battery
key
Prior art date
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
Other languages
English (en)
Inventor
Elmer Reed Corwin
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Application granted granted Critical
Publication of GB191203097A publication Critical patent/GB191203097A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M9/00—Arrangements for interconnection not involving centralised switching
    • H04M9/002—Arrangements for interconnection not involving centralised switching with subscriber controlled access to a line, i.e. key telephone systems

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Devices For Supply Of Signal Current (AREA)
GB191203097D 1912-02-07 1912-02-07 Intercommunication Telephone Systems. Expired GB191203097A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB191203097T 1912-02-07

Publications (1)

Publication Number Publication Date
GB191203097A true GB191203097A (en) 1912-09-19

Family

ID=34358109

Family Applications (1)

Application Number Title Priority Date Filing Date
GB191203097D Expired GB191203097A (en) 1912-02-07 1912-02-07 Intercommunication Telephone Systems.

Country Status (3)

Country Link
DE (1) DE260189C (enrdf_load_stackoverflow)
FR (1) FR439839A (enrdf_load_stackoverflow)
GB (1) GB191203097A (enrdf_load_stackoverflow)

Also Published As

Publication number Publication date
FR439839A (fr) 1912-06-24
DE260189C (enrdf_load_stackoverflow)

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