DE268938C - - Google Patents
Info
- Publication number
- DE268938C DE268938C DENDAT268938D DE268938DA DE268938C DE 268938 C DE268938 C DE 268938C DE NDAT268938 D DENDAT268938 D DE NDAT268938D DE 268938D A DE268938D A DE 268938DA DE 268938 C DE268938 C DE 268938C
- Authority
- DE
- Germany
- Prior art keywords
- mouthpieces
- mouthpiece
- telephone
- person
- speaking
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 244000052616 bacterial pathogen Species 0.000 claims description 2
- 208000015181 infectious disease Diseases 0.000 description 1
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
- H04R1/12—Sanitary or hygienic devices for mouthpieces or earpieces, e.g. for protecting against infection
Landscapes
- Health & Medical Sciences (AREA)
- Public Health (AREA)
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Telephone Set Structure (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB191311198T | 1913-05-13 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE268938C true DE268938C (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) |
Family
ID=32370659
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DENDAT268938D Active DE268938C (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) | 1913-05-13 |
Country Status (3)
-
0
- DE DENDAT268938D patent/DE268938C/de active Active
-
1913
- 1913-05-13 GB GB191311198D patent/GB191311198A/en not_active Expired
- 1913-05-29 FR FR458779A patent/FR458779A/fr not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR458779A (fr) | 1913-10-18 |
| GB191311198A (en) | 1913-09-18 |
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