Polygram GmbH

Patent Applications and Registrations

Patent applications and USPTO patent grants for Polygram GmbH.The latest application filed is for "storage cassette for high storage density, disc-shaped information carriers".

Company Profile

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Polygram GmbH - New York NY
Polygram GmbH - DE DE
Polygram GmbH - Hamburg DE
Polygram GmbH - DT DT

*profile and listings may contain filings by different individuals or companies with the same name. Review application materials to confirm ownership/assignment.

Patent Activity

Patent	Date
Storage cassette for high storage density, disc-shaped information carriers Grant 4,874,085 - Grobecker , et al. October 17, 1	1989-10-17
Arrangement for error detection for disc-shaped information carriers Grant 4,665,513 - Wengler May 12, 1	1987-05-12
Disc-shaped, optically-readable information carrier having a protective edge and/or center part Grant 4,633,458 - Tiefensee December 30, 1	1986-12-30
Storage cassette for two or more disk-shaped high memory density information carriers Grant 4,535,888 - Nusselder August 20, 1	1985-08-20
Method for encoding analog signals using PCM difference code word for forming a code word of specified length Grant 4,438,522 - Bluethgen March 20, 1	1984-03-20
Method for manufacturing disk-shaped information carriers Grant 4,409,169 - Bartholdsten , et al. October 11, 1	1983-10-11
Digital synchronizing system Grant 4,361,898 - Griffiths , et al. November 30, 1	1982-11-30
Anode case for a galvanic bath Grant 4,342,635 - Becker , et al. August 3, 1	1982-08-03
Process for producing a disc-shaped information carrier which has information in the form of a beam-reflecting structure Grant 4,179,532 - Soeding December 18, 1	1979-12-18
Disc-shaped information carrier having information in the form of a beam-reflecting structure and a process for producing the same Grant 4,126,726 - Soeding November 21, 1	1978-11-21
Method and apparatus for monitoring recording level Grant 3,892,921 - Burkowitz July 1, 1	1975-07-01

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