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Class Information
Number: 405/6
Name: Hydraulic and earth engineering > Marine vessel portage, launching, or removing > Dry dock > Gate
Description: Method or apparatus for sealing the entrance into the basin through which the vessel passes.

Patents under this class:

Patent Number Title Of Patent Date Issued
4795298 Marine transportation of bulk cargo Jan. 3, 1989
4231679 Dry dock for building vessels Nov. 4, 1980
4018180 System for building and launching ships Apr. 19, 1977
3955523 Method of continuously building ships May. 11, 1976
3951088 Building equipment for ships' hulls Apr. 20, 1976

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