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GB689889A - Improvements in production of phonographic discs - Google Patents

Improvements in production of phonographic discs

Info

Publication number
GB689889A
GB689889A GB25844/51A GB2584451A GB689889A GB 689889 A GB689889 A GB 689889A GB 25844/51 A GB25844/51 A GB 25844/51A GB 2584451 A GB2584451 A GB 2584451A GB 689889 A GB689889 A GB 689889A
Authority
GB
United Kingdom
Prior art keywords
production
phonographic discs
phonographic
discs
nov
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
GB25844/51A
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.)
Audio Devices Inc
Original Assignee
Audio Devices 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 Audio Devices Inc filed Critical Audio Devices Inc
Publication of GB689889A publication Critical patent/GB689889A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B3/00—Recording by mechanical cutting, deforming or pressing, e.g. of grooves or pits; Reproducing by mechanical sensing; Record carriers therefor
    • G11B3/68—Record carriers
    • G11B3/70—Record carriers characterised by the selection of material or structure; Processes or apparatus specially adapted for manufacturing record carriers

Landscapes

  • Handling Of Sheets (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)

Abstract

689,889. Gramophone records. AUDIO DEVICES, Inc. Nov. 5, 1951 [May 11, 1951], No. 25844/51. Drawings to Specification. Class 40 (ii). The subject-matter of this Specification is identical with that described in Specification 689,888, but the claims differ.
GB25844/51A 1951-05-11 1951-11-05 Improvements in production of phonographic discs Expired GB689889A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US689889XA 1951-05-11 1951-05-11

Publications (1)

Publication Number Publication Date
GB689889A true GB689889A (en) 1953-04-08

Family

ID=22085987

Family Applications (1)

Application Number Title Priority Date Filing Date
GB25844/51A Expired GB689889A (en) 1951-05-11 1951-11-05 Improvements in production of phonographic discs

Country Status (1)

Country Link
GB (1) GB689889A (en)

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