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DK94303C - Apparatus for emitting an acoustic signal, such as a call signal. - Google Patents

Apparatus for emitting an acoustic signal, such as a call signal.

Info

Publication number
DK94303C
DK94303C DK609360A DK609360A DK94303C DK 94303 C DK94303 C DK 94303C DK 609360 A DK609360 A DK 609360A DK 609360 A DK609360 A DK 609360A DK 94303 C DK94303 C DK 94303C
Authority
DK
Denmark
Prior art keywords
signal
emitting
call
acoustic signal
acoustic
Prior art date
Application number
DK609360A
Other languages
Danish (da)
Original Assignee
Philips Nv
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 Philips Nv filed Critical Philips Nv
Application granted granted Critical
Publication of DK94303C publication Critical patent/DK94303C/en

Links

DK609360A 1959-05-23 1960-05-20 Apparatus for emitting an acoustic signal, such as a call signal. DK94303C (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL94303X 1959-05-23

Publications (1)

Publication Number Publication Date
DK94303C true DK94303C (en) 1962-09-10

Family

ID=19759977

Family Applications (1)

Application Number Title Priority Date Filing Date
DK609360A DK94303C (en) 1959-05-23 1960-05-20 Apparatus for emitting an acoustic signal, such as a call signal.

Country Status (1)

Country Link
DK (1) DK94303C (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1474242A (en) * 1923-11-13 Acoustic bbceiving appakattjs
US2598994A (en) * 1949-07-28 1952-06-03 Russell A Gougeon Electromagnetically operated signal producing resonator device
DE1037327B (en) * 1956-06-07 1958-08-21 Western Electric Co Acoustic signal device

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1474242A (en) * 1923-11-13 Acoustic bbceiving appakattjs
US2598994A (en) * 1949-07-28 1952-06-03 Russell A Gougeon Electromagnetically operated signal producing resonator device
DE1037327B (en) * 1956-06-07 1958-08-21 Western Electric Co Acoustic signal device

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