US PATENT SUBCLASS 5 / 257
.~.~.~.~ Top-coil unions
Current as of: June, 1999
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| 5 / | HD | BEDS |
|
| 131 | DF | BEDSTEADS {6} |
| 400 | DF | .~ Having bottom {9} |
| 246 | DF | .~.~ Of springs {3} |
| 254 | DF | .~.~.~ Elements {10} |
| 257 |  | .~.~.~.~ Top-coil unions |
DEFINITION
Classification: 5/257
(under subclass 254) Devices, for means of connecting the end of the top coil of a spiral spring to the adjacent part of a lower turn of the same spring to form a closed top loop.