Quotables
"That’s an amazing invention, but who would ever want to use one of them?"
President Rutherford B. Hayes ; Said in 1876, after Alexander Graham Bell demonstrated the telephone to him at the White House
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| Number | Title | Issue Date |
| 4224614 | Method and apparatus for verification of displayed characters A light pen detection system used in a data display system utilizes a cathode ray tube (CRT) in which characters displayed on the screen of the cathode ray tube are detected by the light pen, the detection of the character by the light pen resulting in th... | 09/23/1980 |
