GB1234274A - - Google Patents
Info
- Publication number
- GB1234274A GB1234274A GB1234274DA GB1234274A GB 1234274 A GB1234274 A GB 1234274A GB 1234274D A GB1234274D A GB 1234274DA GB 1234274 A GB1234274 A GB 1234274A
- Authority
- GB
- United Kingdom
- Prior art keywords
- aperture
- transducers
- shaped
- acoustic
- apertured
- Prior art date
- 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
- 239000000853 adhesive Substances 0.000 abstract 1
- 230000001070 adhesive effect Effects 0.000 abstract 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R11/00—Transducers of moving-armature or moving-core type
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Reciprocating, Oscillating Or Vibrating Motors (AREA)
- Apparatuses For Generation Of Mechanical Vibrations (AREA)
- Motor Or Generator Frames (AREA)
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
- Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US63889267A | 1967-05-16 | 1967-05-16 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1234274A true GB1234274A (enrdf_load_html_response) | 1971-06-03 |
Family
ID=24561888
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB430871A Expired GB1236550A (en) | 1967-05-16 | 1968-05-13 | Magnetic transducer |
| GB1234274D Expired GB1234274A (enrdf_load_html_response) | 1967-05-16 | 1968-05-13 |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB430871A Expired GB1236550A (en) | 1967-05-16 | 1968-05-13 | Magnetic transducer |
Country Status (7)
| Country | Link |
|---|---|
| BE (1) | BE715073A (enrdf_load_html_response) |
| CH (1) | CH514270A (enrdf_load_html_response) |
| DE (1) | DE1762263B2 (enrdf_load_html_response) |
| FR (1) | FR1565242A (enrdf_load_html_response) |
| GB (2) | GB1236550A (enrdf_load_html_response) |
| LU (1) | LU56087A1 (enrdf_load_html_response) |
| NL (1) | NL164452C (enrdf_load_html_response) |
-
1968
- 1968-05-10 FR FR1565242D patent/FR1565242A/fr not_active Expired
- 1968-05-10 CH CH699668A patent/CH514270A/fr not_active IP Right Cessation
- 1968-05-11 NL NL6806731A patent/NL164452C/xx not_active IP Right Cessation
- 1968-05-11 DE DE19681762263 patent/DE1762263B2/de not_active Withdrawn
- 1968-05-13 GB GB430871A patent/GB1236550A/en not_active Expired
- 1968-05-13 BE BE715073D patent/BE715073A/xx unknown
- 1968-05-13 GB GB1234274D patent/GB1234274A/en not_active Expired
- 1968-05-15 LU LU56087D patent/LU56087A1/fr unknown
Also Published As
| Publication number | Publication date |
|---|---|
| LU56087A1 (fr) | 1969-02-10 |
| NL6806731A (enrdf_load_html_response) | 1968-11-18 |
| DE1762263A1 (de) | 1970-04-16 |
| NL164452B (nl) | 1980-07-15 |
| CH514270A (fr) | 1971-10-15 |
| FR1565242A (enrdf_load_html_response) | 1969-04-25 |
| BE715073A (enrdf_load_html_response) | 1968-11-13 |
| NL164452C (nl) | 1980-12-15 |
| GB1236550A (en) | 1971-06-23 |
| DE1762263B2 (de) | 1971-09-09 |
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| GB1234274A (enrdf_load_html_response) | ||
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PCNP | Patent ceased through non-payment of renewal fee |