Patent classifications
B
PERFORMING OPERATIONS; TRANSPORTING
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B63
SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
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B63H
MARINE PROPULSION OR STEERING
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5/00
Arrangements on vessels of propulsion elements directly acting on water
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B63H5/16
characterised by being mounted in recesses; with stationary water-guiding elements; Means to prevent fouling of the propeller, e.g. guards, cages or screens
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B63H5/165
Propeller guards, line cutters or other means for protecting propellers or rudders
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