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
GB5232/35A
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.)
Zeiss Ikon AG
Original Assignee
Zeiss Ikon AG
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 Zeiss Ikon AGfiledCriticalZeiss Ikon AG
Publication of GB437413ApublicationCriticalpatent/GB437413A/en
G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
Landscapes
Manufacture Or Reproduction Of Printing Formes
(AREA)
Printing Plates And Materials Therefor
(AREA)
Abstract
437,413. Photographic projection - printing of sound-records. ZEISS IKON AKT.-GES., 72, Schandauerstrasse, Dresden, Germany. Feb. 18, 1935, No. 5232. Convention date, Feb. 17, 1934. [Class 98 (i)] [See also Group XXXVIII] A multiple variable area sound-record is produced from a negative single record by a projection printing-process involving the use of a cylindrical lens grid 9.
GB5232/35A1934-02-171935-02-18Improvements in or relating to the production of multiple sound records
ExpiredGB437413A
(en)