| 申请人 |
AMERICAN TELEPHONE AND TELEGRAPH CO., NEW YORK, N.Y., US |
发明人 |
DIETRICH, RALPH, NORMAN, ALLENTOWN, PA 18104, US;HOLBROOK, RAYMOND, WALTER, READING, PA 19606, US;JOHNSON, FORBES, JR., ANDERSON, SINKING SPRING, PA 19608, US;ZACHARIAS, ALFRED, PLAINFIELD, NJ 07062, US |
