Hack; Joachim

Patent Applications and Registrations

Patent applications and USPTO patent grants for Hack; Joachim.The latest application filed is for "magnetic recording media".

Company Profile

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Hack; Joachim - Ludwigshafen DE
Hack; Joachim - Frankenthal 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
Magnetic recording media Grant 4,891,114 - Hitzfeld , et al. January 2, 1	1990-01-02
Method and arrangement for detecting error signals in a disk-drive, and a magnetic test disk therefor Grant 4,623,942 - Kraus , et al. November 18, 1	1986-11-18
Method for the surface treatment of magnetic recording media Grant 4,514,937 - Gehrung , et al. May 7, 1	1985-05-07
Document identification employing exchange-anisotropic magnetic material Grant 4,438,462 - Koester , et al. March 20, 1	1984-03-20
Drive apparatus for recording disks in which the disk is clamped between a driven recessed member and a rotatably mounted clamping member Grant 4,430,678 - Hack , et al. February 7, 1	1984-02-07
Document authentication by means of exchange-anisotropic magnetic material Grant 4,396,886 - Koester , et al. August 2, 1	1983-08-02
Magnetic head positioning servo arrangement for a system for recording/reproducing information on a magnetic recording medium, particularly on a flexible magnetic recording medium Grant 4,346,413 - Hack August 24, 1	1982-08-24
Rigid magnetic recording disk having perfluoropolyether lubricant Grant 4,327,139 - Schaefer , et al. April 27, 1	1982-04-27
Track-dependent transducer position control in magneto-dynamic storage devices, and a magnetic recording medium to which this method is applicable Grant 4,157,576 - Hack , et al. June 5, 1	1979-06-05
Magnetic disc, especially a flexible magnetic disc, for track adjustment and amplitude control Grant 4,084,201 - Hack , et al. April 11, 1	1978-04-11
Magnetic recording media having a low coefficient of friction Grant 4,074,002 - Hack , et al. February 14, 1	1978-02-14
Tape Recorder And Magnetic Tape Cassette With Movable Tensioning And Brake Means Grant 3,800,322 - Schoettle , et al. March 26, 1	1974-03-26

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