FR702822A - Perfectionnements aux télégraphones - Google Patents

Perfectionnements aux télégraphones

Info

Publication number
FR702822A
FR702822A FR702822DA FR702822A FR 702822 A FR702822 A FR 702822A FR 702822D A FR702822D A FR 702822DA FR 702822 A FR702822 A FR 702822A
Authority
FR
France
Prior art keywords
telegraphone
telegraphone improvements
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
Valdemar Poulsen
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 filed Critical
Application granted granted Critical
Publication of FR702822A publication Critical patent/FR702822A/fr
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/127—Structure or manufacture of heads, e.g. inductive

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Recording Or Reproducing By Magnetic Means (AREA)
FR702822D 1929-10-01 1930-09-30 Perfectionnements aux télégraphones Expired FR702822A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DK357378X 1929-10-01

Publications (1)

Publication Number Publication Date
FR702822A true FR702822A (fr) 1931-04-17

Family

ID=8150689

Family Applications (1)

Application Number Title Priority Date Filing Date
FR702822D Expired FR702822A (fr) 1929-10-01 1930-09-30 Perfectionnements aux télégraphones

Country Status (2)

Country Link
FR (1) FR702822A (fr)
GB (1) GB357378A (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2431540A (en) * 1945-03-02 1947-11-25 Armour Res Found Magnetic recording head

Also Published As

Publication number Publication date
GB357378A (en) 1931-09-24

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