BE491744A - - Google Patents
Info
- Publication number
- BE491744A BE491744A BE491744DA BE491744A BE 491744 A BE491744 A BE 491744A BE 491744D A BE491744D A BE 491744DA BE 491744 A BE491744 A BE 491744A
- Authority
- BE
- Belgium
Links
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
- H04R11/06—Telephone receivers
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/02—Constructional features of telephone sets
- H04M1/03—Constructional features of telephone transmitters or receivers, e.g. telephone hand-sets
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- 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)
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Electromagnetism (AREA)
- Acoustics & Sound (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB997693X | 1948-10-22 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE491744A true BE491744A (en:Method) |
Family
ID=10867374
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE491744D BE491744A (en:Method) | 1948-10-22 |
Country Status (2)
| Country | Link |
|---|---|
| BE (1) | BE491744A (en:Method) |
| FR (3) | FR997693A (en:Method) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| IE53436B1 (en) * | 1981-09-16 | 1988-11-09 | Besson A P Ltd | Improvements in or relating to telephone transducers |
-
0
- BE BE491744D patent/BE491744A/xx unknown
-
1949
- 1949-10-18 FR FR997693D patent/FR997693A/fr not_active Expired
-
1953
- 1953-12-03 FR FR66033D patent/FR66033E/fr not_active Expired
-
1955
- 1955-10-26 FR FR56119A patent/FR72709E/fr not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR72709E (fr) | 1960-04-28 |
| FR66033E (en:Method) | 1952-04-24 |
| FR997693A (fr) | 1952-01-09 |