CH25937A - Telephone hearing tube - Google Patents

Telephone hearing tube

Info

Publication number
CH25937A
CH25937A CH25937A CH25937DA CH25937A CH 25937 A CH25937 A CH 25937A CH 25937 A CH25937 A CH 25937A CH 25937D A CH25937D A CH 25937DA CH 25937 A CH25937 A CH 25937A
Authority
CH
Switzerland
Prior art keywords
hearing tube
telephone hearing
telephone
tube
hearing
Prior art date
Application number
CH25937A
Other languages
German (de)
Inventor
Imhof Jakob Schlaeppi
Original Assignee
Jakob Schlaeppi & Imhof
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 Jakob Schlaeppi & Imhof filed Critical Jakob Schlaeppi & Imhof
Publication of CH25937A publication Critical patent/CH25937A/en

Links

CH25937A 1902-05-10 1902-05-10 Telephone hearing tube CH25937A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH25937T 1902-05-10

Publications (1)

Publication Number Publication Date
CH25937A true CH25937A (en) 1903-07-15

Family

ID=4237260

Family Applications (1)

Application Number Title Priority Date Filing Date
CH25937A CH25937A (en) 1902-05-10 1902-05-10 Telephone hearing tube

Country Status (1)

Country Link
CH (1) CH25937A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USRE35051E (en) * 1986-08-04 1995-10-03 Moore; Michael R. Combination multiple supported variable position audio intake control devices

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USRE35051E (en) * 1986-08-04 1995-10-03 Moore; Michael R. Combination multiple supported variable position audio intake control devices

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