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| Number | Title | Issue Date |
| 4434739 | Fin rudder for ships A rudder assembly for marine craft wherein the main rudder carries one or more fins pivotable as well as lockable in relation to it, wherein the actuating and control devices for the fin are integrated with the rudder assembly.... | 03/06/1984 |
| 4426288 | Method and apparatus for conveying and damming back lighter liquids floating on specifically heavier liquids, particularly oil floating on water According to the present method a local overspeed is produced in the vicinity of the interface between the two liquids by means of a special apparatus, either actively by a moving component or passively by the relative incident flow. As a result of this o... | 01/17/1984 |
| 4342275 | Fin rudder for ships A rudder assembly for marine craft wherein the main rudder carries one or more fins pivotable as well as lockable in relation to it, wherein the actuating and control devices for the fin are integrated with the rudder assembly.... | 08/03/1982 |
| 4316721 | Method for producing a thrust in manoeuvering engines for a watercraft and a manoeuvering engine constructed for the same The invention relates to a method for producing a thrust in manoeuvering engines for watercraft and a manoeuvering engine constructed for the same, whereby the method comprises the annular driving water jet supplied to the diffuser and enveloping a first ... | 02/23/1982 |
| 4307677 | Rudder for aquatic craft and floating apparatus The invention relates to a rudder for aquatic craft wherein the rudder member is provided with a fin which is pivotable independently thereof and with a rotor on the front edge of the rudder member and/or between the latter and the fin or between the rudd... | 12/29/1981 |
| 3951094 | Gas-driven, pulsating water jet propulsive duct drive for watercraft The invention relates to a gas-driven pulsating water jet propulsive duct drive for watercraft with a propulsive duct which has at the front end an inlet aperture for water with a closure member closing and opening periodically by means of a drive device,... | 04/20/1976 |
