Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Publication of NL69807CpublicationCriticalpatent/NL69807C/xx
F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
F42B19/00—Marine torpedoes, e.g. launched by surface vessels or submarines; Sea mines having self-propulsion means
F42B19/36—Marine torpedoes, e.g. launched by surface vessels or submarines; Sea mines having self-propulsion means adapted to be used for exercise purposes, e.g. indicating position or course
F42B19/38—Marine torpedoes, e.g. launched by surface vessels or submarines; Sea mines having self-propulsion means adapted to be used for exercise purposes, e.g. indicating position or course with means for causing torpedoes to surface at end of run
F42B19/40—Marine torpedoes, e.g. launched by surface vessels or submarines; Sea mines having self-propulsion means adapted to be used for exercise purposes, e.g. indicating position or course with means for causing torpedoes to surface at end of run by expelling liquid ballast
