Inventor
Rudi Lehnert
Inventor
Ludwigshafen, DE
Overview
Patents· 4 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 transducer40%
Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests20%
Y10TTechnical subjects covered by former us classification20%
C01GCompounds containing metals not covered by subclasses c01d or c01f10%
C01PIndexing scheme relating to structural and physical aspects of solid inorganic compounds10%
PatentTitleYear
6,231,963'Magnetic recording media'20015,569,409'Finely divided acicular magnetic modified chromium dioxide'19965,378,383'Process for preparing modified chromium dioxide'19955,030,371'Process for preparing acicular ferromagnetic material consisting essentially of iron-containing chromium dioxide'1991Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1991Patents assigned to BASF AG (1)· patent assignee history
1991–2001Based in Ludwigshafen, DE· patent location history
1995–1996Patents assigned to BASF MAGNETICS GMBH (2)· patent assignee history
2001Patents assigned to EMTEC MAGNETICS GMBH (1)· patent assignee history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| BASF MAGNETICS GMBH | 2 | 1995–1996 |
| BASF AG | 1 | 1991 |
| EMTEC MAGNETICS GMBH | 1 | 2001 |
Locations
| Location | Patents | Span |
|---|---|---|
| Ludwigshafen, DE | 4 | 1991–2001 |