FR508334A - Improvements to telephone equipment - Google Patents

Improvements to telephone equipment

Info

Publication number
FR508334A
FR508334A FR508334A FR508334DA FR508334A FR 508334 A FR508334 A FR 508334A FR 508334 A FR508334 A FR 508334A FR 508334D A FR508334D A FR 508334DA FR 508334 A FR508334 A FR 508334A
Authority
FR
France
Prior art keywords
telephone equipment
telephone
equipment
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
FR508334A
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.)
Relay Automatic Telephone Company Ltd
Original Assignee
Relay Automatic Telephone Company Ltd
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 Relay Automatic Telephone Company Ltd filed Critical Relay Automatic Telephone Company Ltd
Application granted granted Critical
Publication of FR508334A publication Critical patent/FR508334A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/02—Constructional features of telephone sets
    • H04M1/18—Telephone sets specially adapted for use in ships, mines, or other places exposed to adverse environment
FR508334A 1920-01-12 1920-01-12 Improvements to telephone equipment Expired FR508334A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR508334T 1920-01-12

Publications (1)

Publication Number Publication Date
FR508334A true FR508334A (en) 1920-10-07

Family

ID=8910304

Family Applications (1)

Application Number Title Priority Date Filing Date
FR508334A Expired FR508334A (en) 1920-01-12 1920-01-12 Improvements to telephone equipment

Country Status (1)

Country Link
FR (1) FR508334A (en)

Similar Documents

Publication Publication Date Title
FR540819A (en) Improvements to radio-receivers
FR555456A (en) Improvements to telephone transmitters
FR561429A (en) Improvements to telephone cables
FR24721E (en) Improvements to radio-receivers
FR508334A (en) Improvements to telephone equipment
FR511814A (en) Improvements to telephone transmitters
FR508443A (en) Improvements to telephone transmitters
FR547572A (en) Improvements to telephone receivers
FR23769E (en) Improvements to telephone cables
FR530138A (en) Improvements to keys
FR542433A (en) Improvements to phones
FR539569A (en) Improvements to telephone transmitters
FR536736A (en) Improvements to telephone receivers
FR25839E (en) Improvements to telephone receivers
FR528513A (en) Telephone equipment
FR540090A (en) Improvements to telephone networks
FR535868A (en) Improvements to insulators
FR516331A (en) Improvements to talking machines
FR534500A (en) Improvements to constructions
FR533404A (en) Improvements to starters
FR536577A (en) Improvements to jacks
FR27158E (en) Improvements to radio-receivers
FR512434A (en) Improvements to telephone cables
FR508307A (en) Improvements to standards
FR530244A (en) Phone enhancements