Title:
SIGHTING INTERLOCK
United States Patent 3545837
Inventors:
Chapman, Arthur S.
Publication Date:
12/08/1970
Assignee:
HUGHES AIRCRAFT CO
Other Classes:
89/41.190, 89/40.030, 89/38
International Classes:
F41G1/393; F41G7/30; F41G1/00; F41G7/20; G02B21/24; G02B23/16
Foreign References:
| FR892845A | | | | |
| GB448250A | | | | |
| GB459337A | | | | |
| GB574117A | | | | |