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Ellis; James M.
Port Lincoln, AU
No. of patents:

Patent Number Title Of Patent Date Issued
4166462 Self-propelled shark-proof cage September 4, 1979
The invention relates to a self-propelled shark-proof cage which is provided with at least one access opening and a propeller mounting frame having pivot means coupling it to the cage so that the propeller mounting frame is pivotal about two axes at right angles to each other, and the

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