IT8312538A0 - Ricevitore supplementare per apparecchi telefonici - Google Patents
Ricevitore supplementare per apparecchi telefoniciInfo
- Publication number
- IT8312538A0 IT8312538A0 IT8312538A IT1253883A IT8312538A0 IT 8312538 A0 IT8312538 A0 IT 8312538A0 IT 8312538 A IT8312538 A IT 8312538A IT 1253883 A IT1253883 A IT 1253883A IT 8312538 A0 IT8312538 A0 IT 8312538A0
- Authority
- IT
- Italy
- Prior art keywords
- telephone equipment
- additional handset
- handset
- additional
- telephone
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/02—Constructional features of telephone sets
- H04M1/03—Constructional features of telephone transmitters or receivers, e.g. telephone hand-sets
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/18—Methods or devices for transmitting, conducting or directing sound
- G10K11/22—Methods or devices for transmitting, conducting or directing sound for conducting sound through hollow pipes, e.g. speaking tubes
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Multimedia (AREA)
- Telephone Set Structure (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19823221032 DE3221032A1 (de) | 1982-06-04 | 1982-06-04 | Zweithoerer fuer telefonapparate |
Publications (2)
Publication Number | Publication Date |
---|---|
IT8312538A0 true IT8312538A0 (it) | 1983-06-03 |
IT1171171B IT1171171B (it) | 1987-06-10 |
Family
ID=6165272
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
IT12538/83A IT1171171B (it) | 1982-06-04 | 1983-06-03 | Ricevitore supplementare per apparecchi telefonici |
Country Status (3)
Country | Link |
---|---|
AU (1) | AU1367983A (it) |
DE (1) | DE3221032A1 (it) |
IT (1) | IT1171171B (it) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2377116A (en) * | 2001-06-29 | 2002-12-31 | Nokia Corp | A holder for a portable telephone with an amplifying horn |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE375169C (de) * | 1923-05-08 | Friedrich Lehmann | Telephonhilfshoerer mit Einrichtung zum Anschluss eines Nippels bzw. Schlauches, um das zweite Ohr beim Abhoeren zu beteiligen | |
DE1762275A1 (de) * | 1968-05-14 | 1970-09-10 | Miedel Geb Nielsen Dr Phil Hil | Zweithoerer fuer Fernsprechapparate |
DE2752556C2 (de) * | 1977-11-22 | 1979-09-06 | Kurt 1000 Berlin Fuerst | Zweithöhrer für Fernsprechapparate |
-
1982
- 1982-06-04 DE DE19823221032 patent/DE3221032A1/de active Granted
-
1983
- 1983-04-20 AU AU13679/83A patent/AU1367983A/en not_active Abandoned
- 1983-06-03 IT IT12538/83A patent/IT1171171B/it active
Also Published As
Publication number | Publication date |
---|---|
DE3221032C2 (it) | 1990-08-30 |
IT1171171B (it) | 1987-06-10 |
AU1367983A (en) | 1983-12-08 |
DE3221032A1 (de) | 1983-12-08 |
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