KR870004502U - Megaphone - Google Patents

Megaphone

Info

Publication number
KR870004502U
KR870004502U KR2019850011007U KR850011007U KR870004502U KR 870004502 U KR870004502 U KR 870004502U KR 2019850011007 U KR2019850011007 U KR 2019850011007U KR 850011007 U KR850011007 U KR 850011007U KR 870004502 U KR870004502 U KR 870004502U
Authority
KR
South Korea
Prior art keywords
megaphone
Prior art date
Application number
KR2019850011007U
Other languages
Korean (ko)
Other versions
KR880001883Y1 (en
Inventor
한익전
Original Assignee
한익전
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 한익전 filed Critical 한익전
Priority to KR2019850011007U priority Critical patent/KR880001883Y1/en
Publication of KR870004502U publication Critical patent/KR870004502U/en
Application granted granted Critical
Publication of KR880001883Y1 publication Critical patent/KR880001883Y1/en

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
    • H04R27/00—Public address systems
    • H04R27/04—Electric megaphones

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Amplifiers (AREA)
KR2019850011007U 1985-08-28 1985-08-28 Megaphones KR880001883Y1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR2019850011007U KR880001883Y1 (en) 1985-08-28 1985-08-28 Megaphones

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR2019850011007U KR880001883Y1 (en) 1985-08-28 1985-08-28 Megaphones

Publications (2)

Publication Number Publication Date
KR870004502U true KR870004502U (en) 1987-07-31
KR880001883Y1 KR880001883Y1 (en) 1988-05-21

Family

ID=19244978

Family Applications (1)

Application Number Title Priority Date Filing Date
KR2019850011007U KR880001883Y1 (en) 1985-08-28 1985-08-28 Megaphones

Country Status (1)

Country Link
KR (1) KR880001883Y1 (en)

Also Published As

Publication number Publication date
KR880001883Y1 (en) 1988-05-21

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Legal Events

Date Code Title Description
A201 Request for examination
E701 Decision to grant or registration of patent right
REGI Registration of establishment
FPAY Annual fee payment

Payment date: 19910311

Year of fee payment: 4

LAPS Lapse due to unpaid annual fee