FR728628A - Improvements to blank phonograph records and their manufacturing processes - Google Patents

Improvements to blank phonograph records and their manufacturing processes

Info

Publication number
FR728628A
FR728628A FR728628DA FR728628A FR 728628 A FR728628 A FR 728628A FR 728628D A FR728628D A FR 728628DA FR 728628 A FR728628 A FR 728628A
Authority
FR
France
Prior art keywords
blank
manufacturing processes
phonograph records
phonograph
records
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.)
Electrical Research Products Inc
Original Assignee
Electrical Research Products 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 Electrical Research Products Inc filed Critical Electrical Research Products Inc
Application granted granted Critical
Publication of FR728628A publication Critical patent/FR728628A/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
FR728628D 1931-03-23 1931-12-18 Improvements to blank phonograph records and their manufacturing processes Expired FR728628A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US524471A US1936686A (en) 1931-03-23 1931-03-23 Sound recording material and method of manufacture

Publications (1)

Publication Number Publication Date
FR728628A true FR728628A (en) 1932-07-08

Family

ID=24089340

Family Applications (1)

Application Number Title Priority Date Filing Date
FR728628D Expired FR728628A (en) 1931-03-23 1931-12-18 Improvements to blank phonograph records and their manufacturing processes

Country Status (2)

Country Link
US (1) US1936686A (en)
FR (1) FR728628A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2846181A (en) * 1955-06-03 1958-08-05 Int Harvester Co Hydraulic diaphragm valve

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2846181A (en) * 1955-06-03 1958-08-05 Int Harvester Co Hydraulic diaphragm valve

Also Published As

Publication number Publication date
US1936686A (en) 1933-11-28

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