FR2198908B1 - - Google Patents
Info
- Publication number
- FR2198908B1 FR2198908B1 FR7332022A FR7332022A FR2198908B1 FR 2198908 B1 FR2198908 B1 FR 2198908B1 FR 7332022 A FR7332022 A FR 7332022A FR 7332022 A FR7332022 A FR 7332022A FR 2198908 B1 FR2198908 B1 FR 2198908B1
- Authority
- FR
- France
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/62—Record carriers characterised by the selection of the material
- G11B5/68—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent
- G11B5/70—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer
- G11B5/706—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer characterised by the composition of the magnetic material
- G11B5/70626—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer characterised by the composition of the magnetic material containing non-metallic substances
- G11B5/70642—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer characterised by the composition of the magnetic material containing non-metallic substances iron oxides
- G11B5/70678—Ferrites
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/62—Record carriers characterised by the selection of the material
- G11B5/68—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent
- G11B5/70—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer
- G11B5/714—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer characterised by the dimension of the magnetic particles
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US28692672A | 1972-09-07 | 1972-09-07 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| FR2198908A1 FR2198908A1 (enExample) | 1974-04-05 |
| FR2198908B1 true FR2198908B1 (enExample) | 1978-11-10 |
Family
ID=23100740
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR7332022A Expired FR2198908B1 (enExample) | 1972-09-07 | 1973-09-05 |
Country Status (11)
| Country | Link |
|---|---|
| JP (1) | JPS547076B2 (enExample) |
| AU (1) | AU469886B2 (enExample) |
| BE (1) | BE804556A (enExample) |
| CA (1) | CA1021148A (enExample) |
| DE (1) | DE2343701A1 (enExample) |
| ES (1) | ES418329A1 (enExample) |
| FR (1) | FR2198908B1 (enExample) |
| GB (1) | GB1436135A (enExample) |
| IT (1) | IT993890B (enExample) |
| NL (1) | NL7312283A (enExample) |
| SE (1) | SE393889B (enExample) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2916403A1 (de) | 1979-04-23 | 1980-11-06 | Basf Ag | Nadelfoermiges magnetisches eisenoxid und verfahren zu seiner herstellung |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3654163A (en) * | 1968-02-27 | 1972-04-04 | Sony Corp | Cobalt ferrite magnetic powder for tape recording |
-
1973
- 1973-07-13 CA CA176,361A patent/CA1021148A/en not_active Expired
- 1973-08-24 AU AU59592/73A patent/AU469886B2/en not_active Expired
- 1973-08-30 DE DE19732343701 patent/DE2343701A1/de not_active Withdrawn
- 1973-08-30 ES ES418329A patent/ES418329A1/es not_active Expired
- 1973-09-04 SE SE7312024A patent/SE393889B/xx unknown
- 1973-09-05 GB GB4169373A patent/GB1436135A/en not_active Expired
- 1973-09-05 FR FR7332022A patent/FR2198908B1/fr not_active Expired
- 1973-09-06 JP JP10073973A patent/JPS547076B2/ja not_active Expired
- 1973-09-06 IT IT2865873A patent/IT993890B/it active
- 1973-09-06 BE BE135400A patent/BE804556A/xx unknown
- 1973-09-06 NL NL7312283A patent/NL7312283A/xx not_active Application Discontinuation
Also Published As
| Publication number | Publication date |
|---|---|
| AU5959273A (en) | 1975-02-27 |
| JPS547076B2 (enExample) | 1979-04-03 |
| CA1021148A (en) | 1977-11-22 |
| IT993890B (it) | 1975-09-30 |
| JPS4969103A (enExample) | 1974-07-04 |
| DE2343701A1 (de) | 1974-03-14 |
| SE393889B (sv) | 1977-05-23 |
| GB1436135A (en) | 1976-05-19 |
| FR2198908A1 (enExample) | 1974-04-05 |
| AU469886B2 (en) | 1976-02-26 |
| BE804556A (fr) | 1974-01-02 |
| NL7312283A (enExample) | 1974-03-11 |
| ES418329A1 (es) | 1976-03-16 |
Similar Documents
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| ST | Notification of lapse |