CH29901A - Device for counting the speaking time on telephones - Google Patents

Device for counting the speaking time on telephones

Info

Publication number
CH29901A
CH29901A CH29901A CH29901DA CH29901A CH 29901 A CH29901 A CH 29901A CH 29901 A CH29901 A CH 29901A CH 29901D A CH29901D A CH 29901DA CH 29901 A CH29901 A CH 29901A
Authority
CH
Switzerland
Prior art keywords
telephones
counting
speaking time
speaking
time
Prior art date
Application number
CH29901A
Other languages
German (de)
Inventor
Gustav Fuerst
Theodor Kragl
Original Assignee
Gustav Fuerst
Theodor Kragl
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 Gustav Fuerst, Theodor Kragl filed Critical Gustav Fuerst
Publication of CH29901A publication Critical patent/CH29901A/en

Links

CH29901A 1904-01-02 1904-01-02 Device for counting the speaking time on telephones CH29901A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH29901T 1904-01-02

Publications (1)

Publication Number Publication Date
CH29901A true CH29901A (en) 1904-10-15

Family

ID=4246166

Family Applications (1)

Application Number Title Priority Date Filing Date
CH29901A CH29901A (en) 1904-01-02 1904-01-02 Device for counting the speaking time on telephones

Country Status (1)

Country Link
CH (1) CH29901A (en)

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