| 申请人 |
AMERICAN TELEPHONE AND TELEGRAPH CO., NEW YORK, N.Y., US |
发明人 |
AHMAD, MAHMOOD, WINFIELD, IL 60190, US;SAWYER, JOSEPH, ALBERT, WHEATON, IL 60187, US;SCHREINER, LAWRENCE, WAYNE, NAPERVILLE, ILLINOIS 60540, US;THOMAS, HARPER, GERALD, WOODRIDGE, IL 60517, US |
