BE518558A - - Google Patents
Info
- Publication number
- BE518558A BE518558A BE518558DA BE518558A BE 518558 A BE518558 A BE 518558A BE 518558D A BE518558D A BE 518558DA BE 518558 A BE518558 A BE 518558A
- 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
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
- H04R1/22—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only
- H04R1/222—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only for microphones
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S411/00—Expanded, threaded, driven, headed, tool-deformed, or locked-threaded fastener
- Y10S411/999—Expanded, threaded, driven, headed, tool-deformed, or locked-threaded fastener with retainer, e.g. tether
Landscapes
- Health & Medical Sciences (AREA)
- Otolaryngology (AREA)
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Obtaining Desirable Characteristics In Audible-Bandwidth Transducers (AREA)
- Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL310658X | 1952-03-20 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE518558A true BE518558A ( ) |
Family
ID=19783626
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE518558D BE518558A ( ) | 1952-03-20 |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US2720934A ( ) |
| BE (1) | BE518558A ( ) |
| CH (1) | CH310658A ( ) |
| DE (1) | DE916955C ( ) |
| FR (1) | FR1073068A ( ) |
| GB (1) | GB724566A ( ) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1205149B (de) * | 1959-09-07 | 1965-11-18 | Sony Corp | Roehrenmikrophon |
| US3517390A (en) * | 1968-02-29 | 1970-06-23 | Layne Whitehead | High power acoustic radiator |
| US3895688A (en) * | 1972-07-31 | 1975-07-22 | Hyroacoustics Inc | Acoustic transmitter |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR541251A (fr) * | 1920-04-03 | 1922-07-25 | Signal Gmbh | Dispositif pour la suppression des troubles dans la réception acoustique |
| US2363686A (en) * | 1943-10-29 | 1944-11-28 | Harry F. Olson | Acoustic Stethoscope |
-
0
- BE BE518558D patent/BE518558A/xx unknown
-
1953
- 1953-01-27 US US333497A patent/US2720934A/en not_active Expired - Lifetime
- 1953-03-17 GB GB7336/53A patent/GB724566A/en not_active Expired
- 1953-03-18 CH CH310658D patent/CH310658A/de unknown
- 1953-03-18 DE DEN6898A patent/DE916955C/de not_active Expired
- 1953-03-18 FR FR1073068D patent/FR1073068A/fr not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| US2720934A (en) | 1955-10-18 |
| CH310658A (de) | 1955-10-31 |
| FR1073068A (fr) | 1954-09-20 |
| DE916955C (de) | 1954-08-23 |
| GB724566A (en) | 1955-02-23 |