FR411897A - Improvements to telephone transmitters - Google Patents

Improvements to telephone transmitters

Info

Publication number
FR411897A
FR411897A FR411897A FR411897DA FR411897A FR 411897 A FR411897 A FR 411897A FR 411897 A FR411897 A FR 411897A FR 411897D A FR411897D A FR 411897DA FR 411897 A FR411897 A FR 411897A
Authority
FR
France
Prior art keywords
telephone transmitters
transmitters
telephone
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.)
Expired
Application number
FR411897A
Other languages
French (fr)
Inventor
Albert A. Jahnke
Susan C. Tate
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SUSAN C TATE
Original Assignee
SUSAN C TATE
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 SUSAN C TATE filed Critical SUSAN C TATE
Application granted granted Critical
Publication of FR411897A publication Critical patent/FR411897A/en
Expired legal-status Critical Current

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
    • H04R21/00—Variable-resistance transducers
    • H04R21/02—Microphones
    • H04R21/021—Microphones with granular resistance material

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Arrangements For Transmission Of Measured Signals (AREA)
FR411897A 1910-01-20 1910-01-24 Improvements to telephone transmitters Expired FR411897A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB191001518T 1910-01-20

Publications (1)

Publication Number Publication Date
FR411897A true FR411897A (en) 1910-06-28

Family

ID=32559785

Family Applications (1)

Application Number Title Priority Date Filing Date
FR411897A Expired FR411897A (en) 1910-01-20 1910-01-24 Improvements to telephone transmitters

Country Status (2)

Country Link
FR (1) FR411897A (en)
GB (1) GB191001518A (en)

Also Published As

Publication number Publication date
GB191001518A (en) 1910-12-31

Similar Documents

Publication Publication Date Title
FR411897A (en) Improvements to telephone transmitters
FR16829E (en) Improvements to cranes
FR422468A (en) Improvements to cranes
FR415193A (en) Improvements to gasifiers
FR422995A (en) Improvements to suspenders
FR411861A (en) Improvements made to chains
FR419789A (en) Improvements to kinetoscopes
FR419980A (en) Improvements to cinematographs
FR423186A (en) Improvements to taps-valves-mixers
FR422762A (en) Phone enhancements
FR430715A (en) Improvements to telephone transmitters and receivers
FR413092A (en) Improvements to manometers
FR423970A (en) Improvements made to velocipeds
FR414871A (en) Improvements to theater sets
FR472237A (en) Improvements to telephone transmitters
FR412922A (en) Telephone transmitter
FR415224A (en) Improvements to bracelets
FR15062E (en) Improvements to cranes
FR18718E (en) Improvements to cranes
FR434222A (en) Improvements to excavators
FR404286A (en) Improvements to telephone receivers
FR433478A (en) Improvements to talking machines
FR411825A (en) Improvements to talking machines
FR425097A (en) Improvements to talking machines
FR434740A (en) Improvements to talking machines