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Publication of FR712962ApublicationCriticalpatent/FR712962A/en
F41H—ARMOUR; ARMOURED TURRETS; ARMOURED OR ARMED VEHICLES; MEANS OF ATTACK OR DEFENCE, e.g. CAMOUFLAGE, IN GENERAL
F41H5/00—Armour; Armour plates
F41H5/26—Peepholes; Windows; Loopholes
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FR712962D1931-03-171931-03-10
Improvements to observation or sighting windows for protective shields of armored vehicles, guns and the like
ExpiredFR712962A
(en)
Abacus giving the values of the corrections to be made to the coordinates of the goal determined by an observer stationed at a certain distance from the weapon