FR728626A - Improvements to telephone systems - Google Patents

Improvements to telephone systems

Info

Publication number
FR728626A
FR728626A FR728626DA FR728626A FR 728626 A FR728626 A FR 728626A FR 728626D A FR728626D A FR 728626DA FR 728626 A FR728626 A FR 728626A
Authority
FR
France
Prior art keywords
telephone systems
telephone
systems
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
French (fr)
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.)
Associated Electric Laboratories Inc
Original Assignee
Associated Electric Laboratories Inc
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 Associated Electric Laboratories Inc filed Critical Associated Electric Laboratories Inc
Application granted granted Critical
Publication of FR728626A publication Critical patent/FR728626A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q3/00—Selecting arrangements
    • H04Q3/42—Circuit arrangements for indirect selecting controlled by common circuits, e.g. register controller, marker
FR728626D 1930-12-18 1931-12-17 Improvements to telephone systems Expired FR728626A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US503164A US1883589A (en) 1930-12-18 1930-12-18 Telephone system

Publications (1)

Publication Number Publication Date
FR728626A true FR728626A (en) 1932-07-08

Family

ID=24000967

Family Applications (1)

Application Number Title Priority Date Filing Date
FR728626D Expired FR728626A (en) 1930-12-18 1931-12-17 Improvements to telephone systems

Country Status (3)

Country Link
US (1) US1883589A (en)
FR (1) FR728626A (en)
GB (1) GB393583A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE480488A (en) * 1946-03-09

Also Published As

Publication number Publication date
GB393583A (en) 1933-06-06
US1883589A (en) 1932-10-18

Similar Documents

Publication Publication Date Title
FR671055A (en) Improvements to telephone systems
FR721123A (en) Improvements to telephone systems
FR726873A (en) Improvements to telephone systems
FR714881A (en) Improvements to television systems
FR733139A (en) Improvements to telephone systems
FR37802E (en) Improvements to telephone systems
FR680025A (en) Improvements to telephone systems
FR696558A (en) Improvements to telephone systems
FR712321A (en) Improvements to telephone systems
FR728626A (en) Improvements to telephone systems
FR694716A (en) Improvements to telephone systems
FR720490A (en) Improvements to telephone systems
FR726748A (en) Improvements to telephone systems
FR719383A (en) Improvements to telephone systems
FR715391A (en) Improvements to telephone systems
FR710356A (en) Improvements to telephone systems
FR726757A (en) Improvements to telephone systems
FR721406A (en) Improvements to electrical telecommunications systems
FR726997A (en) Improvements to telegraph systems
FR725229A (en) Improvements to telephone systems
FR700201A (en) Improvements to simplex telegraph systems
FR684375A (en) Improvements to telephone systems
FR717671A (en) Telephone systems
FR703958A (en) Improvements to telephone systems
FR714245A (en) Improvements to telephone systems