Inventor
Joachim Hack
Inventor
Ludwigshafen, DE
Overview
Patents· 24 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
G11Bprimary
G11BInformation storage based on relative movement between record carrier and transducer46%
Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests20%
Y10TTechnical subjects covered by former us classification13%
C07FAcyclic, carbocyclic or heterocyclic compounds containing elements other than carbon, hydrogen, halogen, oxygen, nitrogen, sulfur, selenium or tellurium4%
C08KUse of inorganic or non-macromolecular organic substances as compounding ingredients4%
G06KGraphical data reading4%
G07DHandling of coins or valuable papers, e.g. testing, sorting by denominations, counting, dispensing, changing or depositing4%
B24BMachines, devices, or processes for grinding or polishing2%
C08GMacromolecular compounds obtained otherwise than by reactions only involving unsaturated carbon-to-carbon bonds2%
PatentTitleYear
5,084,319'Disk-shaped magnetic recording media, their production and information stores containing these recording media'19925,050,015'Method and arrangement for reducing wear in a magnetic storage means'19914,891,114'Magnetic recording media'19904,796,137'Protective jacket for a disk-shaped recording medium'19894,626,944'Positioning device for scanning means in a disk drive unit'19864,623,942'Method and arrangement for detecting error signals in a disk-drive, and a magnetic test disk therefor'19864,597,990'Preparation of magnetic recording media'19864,551,359'Production of magnetic recording media'19854,534,999'Production of magnetic recording media having a backing coating'19854,514,937'Method for the surface treatment of magnetic recording media'19854,438,462'Document identification employing exchange-anisotropic magnetic material'19844,430,678'Drive apparatus for recording disks in which the disk is clamped between a driven recessed member and a rotatably mounted clamping member'19844,396,886'Document authentication by means of exchange-anisotropic magnetic material'19834,346,413'Magnetic head positioning servo arrangement for a system for recording/reproducing information on a magnetic recording medium, particularly on a flexible magnetic recording medium'19824,327,139'Rigid magnetic recording disk having perfluoropolyether lubricant'19824,320,171'Magnetic recording media containing elastomeric polyurethane binders in the magnetic coating'19824,303,951'Device for compensating unequal write fields in magnetic data-storage devices, especially in disc memories'19814,157,576'Track-dependent transducer position control in magneto-dynamic storage devices, and a magnetic recording medium to which this method is applicable'19794,084,201'Magnetic disc, especially a flexible magnetic disc, for track adjustment and amplitude control'19784,074,002'Magnetic recording media having a low coefficient of friction'19784,018,967'Magnetic recording tape'19774,018,968'Coated magnetic recording media'19774,000,336'Production of magnetic recording media'1976RE029049'Tape recorder and magnetic tape cassette with movable tensioning and brake means'1976Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1976–1992Patents assigned to BASF AG (23)· patent assignee history
1976Based in Frankenthal, DE· patent location history
1977–1992Based in Ludwigshafen, DE· patent location history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| BASF AG | 23 | 1976–1992 |
Locations
| Location | Patents | Span |
|---|---|---|
| Ludwigshafen, DE | 22 | 1977–1992 |
| Frankenthal, DE | 2 | 1976 |