GB190916912A - An Improved Hygienic Guard for the Talking-funnels of Telephone Apparatus. - Google Patents

An Improved Hygienic Guard for the Talking-funnels of Telephone Apparatus.

Info

Publication number
GB190916912A
GB190916912A GB190916912DA GB190916912A GB 190916912 A GB190916912 A GB 190916912A GB 190916912D A GB190916912D A GB 190916912DA GB 190916912 A GB190916912 A GB 190916912A
Authority
GB
United Kingdom
Prior art keywords
guard
funnels
talking
telephone apparatus
improved hygienic
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
Other languages
English (en)
Inventor
Emanuel Sand
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Application granted granted Critical
Publication of GB190916912A publication Critical patent/GB190916912A/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
    • 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)
  • Prepayment Telephone Systems (AREA)
GB190916912D 1909-07-20 1909-07-20 An Improved Hygienic Guard for the Talking-funnels of Telephone Apparatus. Expired GB190916912A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB190916912T 1909-07-20

Publications (1)

Publication Number Publication Date
GB190916912A true GB190916912A (en) 1909-10-07

Family

ID=32444584

Family Applications (1)

Application Number Title Priority Date Filing Date
GB190916912D Expired GB190916912A (en) 1909-07-20 1909-07-20 An Improved Hygienic Guard for the Talking-funnels of Telephone Apparatus.

Country Status (2)

Country Link
FR (1) FR404387A (enrdf_load_html_response)
GB (1) GB190916912A (enrdf_load_html_response)

Also Published As

Publication number Publication date
FR404387A (enrdf_load_html_response)

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