JPH0192830U - - Google Patents
Info
- Publication number
- JPH0192830U JPH0192830U JP18980387U JP18980387U JPH0192830U JP H0192830 U JPH0192830 U JP H0192830U JP 18980387 U JP18980387 U JP 18980387U JP 18980387 U JP18980387 U JP 18980387U JP H0192830 U JPH0192830 U JP H0192830U
- Authority
- JP
- Japan
- Prior art keywords
- book holder
- book
- illuminance
- sensor
- alarm
- 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.)
- Pending
Links
- 238000005259 measurement Methods 0.000 claims description 3
Landscapes
- Photometry And Measurement Of Optical Pulse Characteristics (AREA)
- Tables And Desks Characterized By Structural Shape (AREA)
- Optical Radar Systems And Details Thereof (AREA)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP18980387U JPH0192830U (tr) | 1987-12-14 | 1987-12-14 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP18980387U JPH0192830U (tr) | 1987-12-14 | 1987-12-14 |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH0192830U true JPH0192830U (tr) | 1989-06-19 |
Family
ID=31480814
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP18980387U Pending JPH0192830U (tr) | 1987-12-14 | 1987-12-14 |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0192830U (tr) |
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1987
- 1987-12-14 JP JP18980387U patent/JPH0192830U/ja active Pending