Inventor

Eberhard Koester

Inventor

Frankenthal, DE

Overview

1976–1990

Patent span

Physics

Primary field (CPC G)

Patents· 39 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 transducer33%

C01PIndexing scheme relating to structural and physical aspects of solid inorganic compounds10%

H01FMagnets10%

Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests10%

C01GCompounds containing metals not covered by subclasses c01d or c01f8%

Y10TTechnical subjects covered by former us classification8%

B22FWorking metallic powder3%

C09BOrganic dyes or closely-related compounds for producing dyes, e.g. pigments2%

C09CTreatment of inorganic materials, other than fibrous fillers, to enhance their pigmenting or filling properties2%

G06KGraphical data reading2%

PatentTitleYear

4,939,012'Naphtholactam dyes and optical recording medium containing these dyes'1990 4,876,356'Naphtholactam dyes and optical recording medium containing these days'1989 4,668,586'Magnetic recording media'1987 4,656,548'Tape cassette containing echo-erasing means'1987 4,567,108'Magnetic recording media'1986 4,497,723'Preparation of acicular, ferrimagnetic iron oxides'1985 4,472,455'Production of magnetic recording media'1984 4,453,683'Magnetic tape cassette arrangements'1984 4,438,462'Document identification employing exchange-anisotropic magnetic material'1984 4,430,362'Production of magnetic recording media'1984 4,423,454'Magnetic recording disk'1983 4,420,330'Stabilization of pyrophoric ferromagnetic acicular metal particles consisting essentially of iron'1983 4,414,287'Magnetic recording medium and its manufacture'1983 4,396,886'Document authentication by means of exchange-anisotropic magnetic material'1983 4,382,244'Device for magnetically orienting the magnetizable particles or magnetic recording media in a preferred direction'1983 4,287,233'Manufacture of acicular cobalt-containing magnetic iron oxide'1981 4,287,225'Process of making a magnetic recording medium'1981 4,221,776'Manufacture of acicular ferrimagnetic iron oxides'1980 4,213,222'Cleaning apparatus for a web of plastics film having a magnetic coating'1980 4,213,959'Manufacture of acicular, ferrimagnetic iron oxide'1980 4,201,486'Process for the manufacture of magnetic recording media'1980 4,201,149'Apparatus for spin coating in the production of thin magnetic layers for magnetic discs'1980 4,188,302'Manufacture of acicular cobalt-modified magnetic iron oxide'1980 4,178,171'Manufacture of acicular ferromagnetic iron particles'1979 4,177,317'Stabilization of chromium dioxide magnetic pigments'1979 4,165,232'Manufacture of ferromagnetic metal particles essentially consisting of iron'1979 4,133,911'Manufacture of magnetic discs'1979 4,073,977'Stabilization of pyrophoric metal powders with alkylene oxide polymers'1978 4,071,610'Manufacture of gamma-iron(III) oxide'1978 4,064,292'Manufacture of cobalt-modified .gamma.-iron(III)oxides'1977 4,061,726'Manufacture of acicular .gamma.-iron(III) oxide'1977 4,050,962'Manufacture of ferromagnetic, acicular metallic iron particles by hydrogen reduction'1977 4,018,882'Manufacture of gamma-iron (III) oxide'1977 4,017,303'Manufacture of acicular ferromagnetic metal pigments containing iron'1977 4,011,593'Magnetic tape cassette with screening shield'1977 4,003,336'Device for the magnetic orientation of magnetic recording media'1977 3,984,763'Device for the non-destructive measurement of the remanent flux density of magnetic recording media, especially magnetic discs'1976 3,961,990'Manufacture of magnetic materials which exhibit exchange anisotropy'1976 3,959,032'Magnetic materials with exchange anisotropy and process for their manufacture'1976

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1976–1990Patents assigned to BASF AG (39)· patent assignee history

1976–1990Based in Frankenthal, DE· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
BASF AG	39	1976–1990

Locations

Location	Patents	Span
Frankenthal, DE	39	1976–1990