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Class Information
Number: 441/45
Name: Buoys, rafts, and aquatic devices > Rafts > Columnar flotation member > Hollow
Description: Device wherein the buoyancy providing member contains a void.

Sub-classes under this class:

Class Number Class Name Patents
441/46 Barrel or drum 2

Patents under this class:

Patent Number Title Of Patent Date Issued
6598552 Pontoon having a cross section with a non-uniform diameter and boat having same Jul. 29, 2003
5888024 Marine dock and flotation tank Mar. 30, 1999
5707724 Fractal tube reinforcement Jan. 13, 1998
5238231 Shock-absorbing units interconnectable to form shock-absorbing structures Aug. 24, 1993
5226184 Floatable wave subduing blanket Jul. 13, 1993
5062817 Boomstick Nov. 5, 1991
5061215 River raft Oct. 29, 1991
5013270 River raft May. 7, 1991
4487588 Submersible raft for the cultivation of plant life Dec. 11, 1984
4119052 Semi-submersible vessel Oct. 10, 1978
4022187 Floating solar heater for swimming pools May. 10, 1977
3953904 Design and construction of hulls May. 4, 1976

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