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Class Information
Number: 405/194
Name: Hydraulic and earth engineering > Diving > With continuous surface access
Description: Method or apparatus wherein the means with which personnel may carry on an underwater operation includes an uninterrupted passageway between the water surface and an underwater site.

Patents under this class:

Patent Number Title Of Patent Date Issued
7258509 Diving apparatus Aug. 21, 2007
7114882 Aqua-terra planetary transport system and development pneumatic and electro-magnetic underwater tube-link transportation system Oct. 3, 2006
5639186 Water funnel Jun. 17, 1997
5199193 Working machine Apr. 6, 1993
5049004 Underwater building and constructing method thereof Sep. 17, 1991
4904118 Structure for viewing an underwater environment Feb. 27, 1990
4872781 Open top floatable barge repair box with barge to box sealing system Oct. 10, 1989
4867608 Method and apparatus for repairing submerged liners Sep. 19, 1989
4615641 Barge repair device Oct. 7, 1986
4433937 Method of tunnel construction employing submerged caisson Feb. 28, 1984
4268191 Stand-by service structure for casual off-shore attendance May. 19, 1981
4186532 Underwater observatory Feb. 5, 1980
4123858 Versatile submersible device for dredging or other underwater functions Nov. 7, 1978
3986280 Apparatus for forming a concrete wall Oct. 19, 1976

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