Cutting – Other than completely through work thickness or through work... – Combined types of cutting
Patent
1987-12-21
1988-10-18
Yost, Frank T.
Cutting
Other than completely through work thickness or through work...
Combined types of cutting
83 13, 83870, 5434, B26D 300
Patent
active
047778555
ABSTRACT:
A composite plastic foam pillow has a convoluted upper surface, a flat lower surface and a core disposed between those surfaces which is provided with a central void for imparting decreased firmness to the pillow adjacent the void. It is fabricated by coring a block of plastic foam, cutting out a central portion of the core, and then replacing the core and sealing it in its original position.
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Pro Tech Pacific, The Pro Pillow, 1981.
Convo Corporation
Huebner Harlan P.
Yost Frank T.
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