AT116452B - Sound signaling device. - Google Patents

Sound signaling device.

Info

Publication number
AT116452B
AT116452B AT116452DA AT116452B AT 116452 B AT116452 B AT 116452B AT 116452D A AT116452D A AT 116452DA AT 116452 B AT116452 B AT 116452B
Authority
AT
Austria
Prior art keywords
signaling device
sound signaling
sound
signaling
Prior art date
Application number
Other languages
German (de)
Inventor
Helge Sven Albert Ing Rydberg
Original Assignee
Helge Sven Albert Ing Rydberg
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 Helge Sven Albert Ing Rydberg filed Critical Helge Sven Albert Ing Rydberg
Application granted granted Critical
Publication of AT116452B publication Critical patent/AT116452B/en

Links

AT116452D 1928-02-27 1928-11-28 Sound signaling device. AT116452B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE116452T 1928-02-27

Publications (1)

Publication Number Publication Date
AT116452B true AT116452B (en) 1930-02-25

Family

ID=29276644

Family Applications (1)

Application Number Title Priority Date Filing Date
AT116452D AT116452B (en) 1928-02-27 1928-11-28 Sound signaling device.

Country Status (1)

Country Link
AT (1) AT116452B (en)

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