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NL1734C - Sound box for telephones - Google Patents

Sound box for telephones

Info

Publication number
NL1734C
NL1734C NL2523A NL2523A NL1734C NL 1734 C NL1734 C NL 1734C NL 2523 A NL2523 A NL 2523A NL 2523 A NL2523 A NL 2523A NL 1734 C NL1734 C NL 1734C
Authority
NL
Netherlands
Prior art keywords
telephones
sound box
sound
box
Prior art date
Application number
NL2523A
Other languages
Dutch (nl)
Original Assignee
Stille Curt Dr
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 Stille Curt Dr filed Critical Stille Curt Dr
Application granted granted Critical
Publication of NL1734C publication Critical patent/NL1734C/en

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
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/42—Combinations of transducers with fluid-pressure or other non-electrical amplifying means

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Reciprocating, Oscillating Or Vibrating Motors (AREA)
  • Electromagnets (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
  • Telephone Set Structure (AREA)
NL2523A 1912-04-24 1913-04-24 Sound box for telephones NL1734C (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE287865T 1912-04-24

Publications (1)

Publication Number Publication Date
NL1734C true NL1734C (en) 1916-12-01

Family

ID=6059598

Family Applications (1)

Application Number Title Priority Date Filing Date
NL2523A NL1734C (en) 1912-04-24 1913-04-24 Sound box for telephones

Country Status (4)

Country Link
DE (2) DE287865C (en)
FR (1) FR456985A (en)
GB (2) GB191309644A (en)
NL (1) NL1734C (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2967094B2 (en) * 1995-11-02 1999-10-25 工業技術院長 Aluminum nitride sintered body and method for producing aluminum nitride powder

Also Published As

Publication number Publication date
GB191510669A (en) 1921-07-11
DE287865C (en) 1915-10-06
DE288502C (en) 1915-11-03
FR456985A (en) 1913-09-09
GB191309644A (en) 1913-07-24

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