NL35348C - - Google Patents
Info
- Publication number
- NL35348C NL35348C NL35348DA NL35348C NL 35348 C NL35348 C NL 35348C NL 35348D A NL35348D A NL 35348DA NL 35348 C NL35348 C NL 35348C
- Authority
- NL
- Netherlands
Links
Classifications
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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
- 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
-
- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63H—TOYS, e.g. TOPS, DOLLS, HOOPS OR BUILDING BLOCKS
- A63H33/00—Other toys
- A63H33/04—Building blocks, strips, or similar building parts
- A63H33/10—Building blocks, strips, or similar building parts to be assembled by means of additional non-adhesive elements
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
- H04R9/08—Microphones
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Health & Medical Sciences (AREA)
- Otolaryngology (AREA)
- Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
- Apparatuses For Generation Of Mechanical Vibrations (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE602845T | 1930-08-22 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL35348C true NL35348C (xx) |
Family
ID=34608831
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL35348D NL35348C (xx) | 1930-08-22 |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US2047777A (xx) |
| DE (1) | DE602845C (xx) |
| FR (1) | FR720012A (xx) |
| GB (1) | GB376951A (xx) |
| NL (1) | NL35348C (xx) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2527344A (en) * | 1947-01-30 | 1950-10-24 | Rca Corp | Pressure gradient responsive microphone |
| US3079471A (en) * | 1961-03-01 | 1963-02-26 | Ampex | Loudspeaker |
-
0
- NL NL35348D patent/NL35348C/xx active
-
1930
- 1930-08-22 DE DE1930602845D patent/DE602845C/de not_active Expired
-
1931
- 1931-07-15 GB GB20357/31A patent/GB376951A/en not_active Expired
- 1931-07-15 FR FR720012D patent/FR720012A/fr not_active Expired
- 1931-08-20 US US558314A patent/US2047777A/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| GB376951A (en) | 1932-07-21 |
| US2047777A (en) | 1936-07-14 |
| DE602845C (de) | 1934-09-18 |
| FR720012A (fr) | 1932-02-15 |