JPS537855B2 - - Google Patents
Info
- Publication number
- JPS537855B2 JPS537855B2 JP5698974A JP5698974A JPS537855B2 JP S537855 B2 JPS537855 B2 JP S537855B2 JP 5698974 A JP5698974 A JP 5698974A JP 5698974 A JP5698974 A JP 5698974A JP S537855 B2 JPS537855 B2 JP S537855B2
- Authority
- JP
- Japan
- 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.)
- Expired
Links
Landscapes
- Electrically Operated Instructional Devices (AREA)
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5698974A JPS537855B2 (en) | 1974-05-21 | 1974-05-21 | |
| US05/578,966 US4079365A (en) | 1974-05-21 | 1975-05-19 | Group response and indication system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5698974A JPS537855B2 (en) | 1974-05-21 | 1974-05-21 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS50149423A JPS50149423A (en) | 1975-11-29 |
| JPS537855B2 true JPS537855B2 (en) | 1978-03-23 |
Family
ID=13042891
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5698974A Expired JPS537855B2 (en) | 1974-05-21 | 1974-05-21 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS537855B2 (en) |
-
1974
- 1974-05-21 JP JP5698974A patent/JPS537855B2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS50149423A (en) | 1975-11-29 |