US PATENT SUBCLASS 297 / 284.6
.~.~ Having a fluent material within flexible container

Current as of: June, 1999
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297 /   HD   CHAIRS AND SEATS

284.1  DF  BOTTOM OR BACK WITH MEANS TO ALTER CONTOUR {5}
284.4  DF  .~ Providing support for lower back (i.e., lumbar) region {4}
284.6.~.~ Having a fluent material within flexible container

DEFINITION

Classification: 297/284.6

Having a fluent material within flexible container:

(under subclass 284.4) Device in which the lumbar support has a variable volume controlled by introduction or removal of a fluid (e.g., with gas, water, air, etc.).