CN87214821U - 门铃电话对讲机 - Google Patents
门铃电话对讲机 Download PDFInfo
- Publication number
- CN87214821U CN87214821U CN 87214821 CN87214821U CN87214821U CN 87214821 U CN87214821 U CN 87214821U CN 87214821 CN87214821 CN 87214821 CN 87214821 U CN87214821 U CN 87214821U CN 87214821 U CN87214821 U CN 87214821U
- Authority
- CN
- China
- Prior art keywords
- intercom
- circuit
- door bell
- power amplification
- loud speaker
- Prior art date
- Legal status (The legal status 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 status listed.)
- Withdrawn
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- Interconnected Communication Systems, Intercoms, And Interphones (AREA)
Abstract
Description
Claims (2)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN 87214821 CN87214821U (zh) | 1987-10-26 | 1987-10-26 | 门铃电话对讲机 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN 87214821 CN87214821U (zh) | 1987-10-26 | 1987-10-26 | 门铃电话对讲机 |
Publications (1)
Publication Number | Publication Date |
---|---|
CN87214821U true CN87214821U (zh) | 1988-10-05 |
Family
ID=4829061
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN 87214821 Withdrawn CN87214821U (zh) | 1987-10-26 | 1987-10-26 | 门铃电话对讲机 |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN87214821U (zh) |
-
1987
- 1987-10-26 CN CN 87214821 patent/CN87214821U/zh not_active Withdrawn
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
C06 | Publication | ||
PB01 | Publication | ||
C14 | Grant of patent or utility model | ||
GR01 | Patent grant | ||
C53 | Correction of patent for invention or patent application | ||
CB02 | Change of applicant information |
Patentee address after: No. 34, Xinhua Road, Hebei, Hengshui Address of the applicant after: No. 34, Xinhua Road, Hebei, Hengshui Address of the applicant before: Wuqiang County, Hebei province bean village credit cooperatives Patentee address before: Wuqiang County, Hebei province bean village credit cooperatives |
|
COR | Change of bibliographic data |
Free format text: CORRECT: APPLICANT ADDRESS; FROM: DOU VILLAGE, WUQIANG COUNTY, HEBEI PROVINCE TO: NO. 34, XINHUA ROAD, HENGSHUI CITY, HEBEI PROVINCE; PATENTEE ADDRESS; FROM: DOU VILLAGE, WUQIANG COUNTY, HEBEI PROVINCE TO: NO. 34, XINHUA ROAD, HENGSHUI CITY, HEBEI PROVINCE |
|
C19 | Lapse of patent right due to non-payment of the annual fee | ||
CF01 | Termination of patent right due to non-payment of annual fee |