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Individual
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Priority to ES0265500ApriorityCriticalpatent/ES265500A1/en
Publication of ES265500A1publicationCriticalpatent/ES265500A1/en
Improvements in boats prepared for underwater observation, characterized by the fact that on the bottom of the vessel there are a plurality of observation chambers constituted by a transparent and substantially horizontal panel in the bottom of the vessel that closes inferiorly to a water chamber, completely devoid of air, and other transparent panels that close above said water chamber, for observation from inside the boat. (Machine-translation by Google Translate, not legally binding)
ES0265500A1961-03-081961-03-08Improvements in vessels for underwater observation (Machine-translation by Google Translate, not legally binding)
ExpiredES265500A1
(en)
Improvements in light alloy helmets that facilitate engine ventilation, for pleasure boats (Machine-translation by Google Translate, not legally binding)