Inventor
Tetsuhito Yoneyama
Inventor
Narashino, JP
Overview
Patents· 12 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
H01Fprimary
H01FMagnets35%
Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests15%
Y10TTechnical subjects covered by former us classification15%
B22DCasting of metals12%
B22FWorking metallic powder6%
C22CAlloys6%
C01GCompounds containing metals not covered by subclasses c01d or c01f3%
C01PIndexing scheme relating to structural and physical aspects of solid inorganic compounds3%
G11BInformation storage based on relative movement between record carrier and transducer3%
H05KPrinted circuits3%
PatentTitleYear
5,993,939'Method for preparing permanent magnet material, chill roll, permanent magnet material, and permanent magnet material powder'19995,916,376'Preparation of magnet'19995,750,044'Magnet and bonded magnet'19985,665,177'Method for preparing permanent magnet material, chill roll, permanent magnet material, and permanent magnet material powder'19975,309,977'Permanent magnet material and method for making'19945,229,219'Magnetic recording medium comprising a magnetic layer containing a specified magnetic ferrite powder and having a curie temperature up to 180.degree. C.'19935,209,789'Permanent magnet material and method for making'19935,049,208'Permanent magnets'19915,022,939'Permanent magnets'19914,836,868'Permanent magnet and method of producing same'19894,213,803'R.sub.2 Co.sub.17 Rare type-earth-cobalt, permanent magnet material and process for producing the same'19804,210,471'Permanent magnet material and process for producing the same'1980Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1980Patents assigned to TDK ELECTRONICS CO LTD (2)· patent assignee history
1980Based in Ichikawa, JP· patent location history
1989–1999Patents assigned to TDK CORP (10)· patent assignee history
1989–1999Based in Narashino, JP· patent location history
1993–1999Based in Chiba, JP· patent location history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| TDK CORP | 10 | 1989–1999 |
| TDK ELECTRONICS CO LTD | 2 | 1980 |
Locations
| Location | Patents | Span |
|---|---|---|
| Narashino, JP | 7 | 1989–1999 |
| Chiba, JP | 3 | 1993–1999 |
| Ichikawa, JP | 2 | 1980 |