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Class Information
Number: 114/52
Name: Ships > Vessel raising and docking > Submerged > Air tanks
Description: Vessels, tanks, or receptacles for containing air adapted when filled to raise a sunken vessel by their combined buoyant force.
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 6789587 |
Method and apparatus for underwater tree cutting and retrieval |
Sep. 14, 2004 |
| 6575105 |
Device for transporting loads under water and usable as a lifting pontoon |
Jun. 10, 2003 |
| 6460476 |
Buoyancy device |
Oct. 8, 2002 |
| 6152065 |
Apparatus for launching and recovery of boats |
Nov. 28, 2000 |
| 5860765 |
In-water dry dock system with removable centerline insert |
Jan. 19, 1999 |
| 5755172 |
Underwater lifting apparatus |
May. 26, 1998 |
| 5549070 |
In-water dry dock system |
Aug. 27, 1996 |
| 5516235 |
Method and apparatus of raising objects from the sea bed |
May. 14, 1996 |
| 5251558 |
Underwater salvage apparatus |
Oct. 12, 1993 |
| 5031555 |
Neutral buoyancy device |
Jul. 16, 1991 |
| 5007364 |
Gas control valves and apparatus for controlling buoyancy in water |
Apr. 16, 1991 |
| 4782778 |
Inflation valve device |
Nov. 8, 1988 |
| 4586850 |
Underwater trenching system |
May. 6, 1986 |
| 4498408 |
Lifting body for diving |
Feb. 12, 1985 |
| 4276846 |
Recovery apparatus |
Jul. 7, 1981 |
| 4069923 |
Buoyancy elevator for moving a load in an industrial facility such as a nuclear power plant |
Jan. 24, 1978 |
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