NL4289C - - Google Patents
Info
- Publication number
- NL4289C NL4289C NL9213A NL9213A NL4289C NL 4289 C NL4289 C NL 4289C NL 9213 A NL9213 A NL 9213A NL 9213 A NL9213 A NL 9213A NL 4289 C NL4289 C NL 4289C
- 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
- H04R25/00—Deaf-aid sets, i.e. electro-acoustic or electro-mechanical hearing aids; Electric tinnitus maskers providing an auditory perception
- H04R25/04—Deaf-aid sets, i.e. electro-acoustic or electro-mechanical hearing aids; Electric tinnitus maskers providing an auditory perception comprising pocket amplifiers
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R25/00—Deaf-aid sets, i.e. electro-acoustic or electro-mechanical hearing aids; Electric tinnitus maskers providing an auditory perception
- H04R25/65—Housing parts, e.g. shells, tips or moulds, or their manufacture
Landscapes
- Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Neurosurgery (AREA)
- Otolaryngology (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Manufacturing & Machinery (AREA)
- Telephone Set Structure (AREA)
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL9213A NL4289C (xx) | 1917-12-28 | 1917-12-28 | |
| DE1918329372D DE329372C (de) | 1917-12-28 | 1918-12-28 | Hoerapparat fuer Schwerhoerige |
| GB7576/19A GB139043A (en) | 1917-12-28 | 1919-03-26 | Improvements in hearing appliances |
| US30991519 US1318874A (en) | 1917-12-28 | 1919-07-10 | Ghiemstra |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL9213A NL4289C (xx) | 1917-12-28 | 1917-12-28 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL4289C true NL4289C (xx) | 1919-12-01 |
Family
ID=38110025
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL9213A NL4289C (xx) | 1917-12-28 | 1917-12-28 |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US1318874A (xx) |
| DE (1) | DE329372C (xx) |
| GB (1) | GB139043A (xx) |
| NL (1) | NL4289C (xx) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2733302A (en) * | 1956-01-31 | Microphone mounting for hearing aids | ||
| US2506981A (en) * | 1946-10-25 | 1950-05-09 | Lawrence G Weaver | Air conduction hearing aid having adjacently mounted microphone and receiver |
| US2616985A (en) * | 1950-09-28 | 1952-11-04 | Maurice W Levy | Hearing aid device |
| US2673898A (en) * | 1951-06-01 | 1954-03-30 | Sonotone Corp | Wearable hearing aid having external microphone with penetrating pin connector structure |
| US2775652A (en) * | 1953-07-20 | 1956-12-25 | Stutz Rolf | Hearing aid casing |
-
1917
- 1917-12-28 NL NL9213A patent/NL4289C/xx active
-
1918
- 1918-12-28 DE DE1918329372D patent/DE329372C/de not_active Expired
-
1919
- 1919-03-26 GB GB7576/19A patent/GB139043A/en not_active Expired
- 1919-07-10 US US30991519 patent/US1318874A/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| DE329372C (de) | 1920-11-20 |
| GB139043A (en) | 1920-02-26 |
| US1318874A (en) | 1919-10-14 |