| 摘要 |
833,726. Aircraft indicators. RAMOWOOLDRIDGE CORPORATION. May 27, 1957 [May 28, 1956], No. 16801/57. Class 4. [Also in Group XL(c)] An aircraft radar system (see Group XL(c)) pilot's indicating panel gives visual and audible warnings (i) for turning to avoid collision 401, (ii) of stationary objects within the system range 413, 414, (iii) of nearby objects generally 411, 412 and those rearward 415, 416 ; a ground speed indicator 418 is included. |
