IT1171171B - Ricevitore supplementare per apparecchi telefonici - Google Patents

Ricevitore supplementare per apparecchi telefonici

Info

Publication number
IT1171171B
IT1171171B IT12538/83A IT1253883A IT1171171B IT 1171171 B IT1171171 B IT 1171171B IT 12538/83 A IT12538/83 A IT 12538/83A IT 1253883 A IT1253883 A IT 1253883A IT 1171171 B IT1171171 B IT 1171171B
Authority
IT
Italy
Prior art keywords
telephone devices
additional receiver
receiver
additional
telephone
Prior art date
Application number
IT12538/83A
Other languages
English (en)
Italian (it)
Other versions
IT8312538A0 (it
Inventor
Reinhard Napierski
Original Assignee
Reinhard Napierski
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Reinhard Napierski filed Critical Reinhard Napierski
Publication of IT8312538A0 publication Critical patent/IT8312538A0/it
Application granted granted Critical
Publication of IT1171171B publication Critical patent/IT1171171B/it

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)
IT12538/83A 1982-06-04 1983-06-03 Ricevitore supplementare per apparecchi telefonici IT1171171B (it)

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 IT8312538A0 (it) 1983-06-03
IT1171171B true 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 (enExample)
DE (1) DE3221032A1 (enExample)
IT (1) IT1171171B (enExample)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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

Also Published As

Publication number Publication date
IT8312538A0 (it) 1983-06-03
DE3221032A1 (de) 1983-12-08
DE3221032C2 (enExample) 1990-08-30
AU1367983A (en) 1983-12-08

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