US Patent Class 441
BUOYS, RAFTS, AND AQUATIC DEVICES-- Main Headings




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Current as of: June, 1999
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CLASS NOTES
1  DF  BUOY {6}
35  DF  RAFTS {8}
55  DF  SWIMMING AID TO INCREASE STROKE EFFICIENCY {4}
65  DF  WATER SKIMMING OR WALKING DEVICE {7}
80  DF  WATER RESCUE OR LIFE PROTECTING APPARATUS {8}
129  DF  BODY SUPPORTING BUOYANT DEVICE {1}
133  DF  BUOYANCY PROVIDING ATTACHMENT FOR PIPE, LOG, OR LINE {1}
135  DF  BUOYANCY UNDERWATER VIEWING DEVICE
136  DF  MISCELLANEOUS