NL54031C - - Google Patents
Info
- Publication number
- NL54031C NL54031C NL54031DA NL54031C NL 54031 C NL54031 C NL 54031C NL 54031D A NL54031D A NL 54031DA NL 54031 C NL54031 C NL 54031C
- Authority
- NL
- Netherlands
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
- H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
- H04R9/12—Gramophone pick-ups using a stylus; Recorders using a stylus
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Reciprocating, Oscillating Or Vibrating Motors (AREA)
- Details Of Audible-Bandwidth Transducers (AREA)
- Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
- Telephone Set Structure (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE207878X | 1937-07-28 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL54031C true NL54031C (fr) |
Family
ID=5793934
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL54031D NL54031C (fr) | 1937-07-28 |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US2240918A (fr) |
| BE (1) | BE429396A (fr) |
| CH (1) | CH207878A (fr) |
| FR (1) | FR841322A (fr) |
| GB (1) | GB510297A (fr) |
| NL (1) | NL54031C (fr) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2473650A (en) * | 1943-06-10 | 1949-06-21 | Zenith Radio Corp | Phonograph pickup with mechanical filter |
| US2547361A (en) * | 1947-05-19 | 1951-04-03 | Donald J Baker | Pickup head using torsional mount for armatures |
| US2622156A (en) * | 1949-01-27 | 1952-12-16 | Donald J Baker | Pickup head with removable armature and stylus assembly |
| US2637920A (en) * | 1949-04-28 | 1953-05-12 | Richard H Hallsted | Barrier for motor vehicle parking systems |
| NL251609A (fr) * | 1959-05-21 |
-
0
- NL NL54031D patent/NL54031C/xx active
- BE BE429396D patent/BE429396A/xx unknown
-
1938
- 1938-06-18 US US214608A patent/US2240918A/en not_active Expired - Lifetime
- 1938-07-25 GB GB22052/38A patent/GB510297A/en not_active Expired
- 1938-07-26 CH CH207878D patent/CH207878A/de unknown
- 1938-07-28 FR FR841322D patent/FR841322A/fr not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| US2240918A (en) | 1941-05-06 |
| BE429396A (fr) | |
| GB510297A (en) | 1939-07-31 |
| FR841322A (fr) | 1939-05-17 |
| CH207878A (de) | 1939-12-15 |