04446634 is referenced by 201 patents and cites 7 patents.

Footwear having improved shock absorption in a shoe having a heel and box portion, a first flat elastomeric bladder supported by the shoe heel portion to bear the weight of the heel of the foot of a user, an elastomeric bladder portion supported by the shoe box portion to bear the weight of the ball portion of the foot of a user, a conduit connecting the first and second bladders, and a valve in the conduit permitting a selectable rate of flow of fluid between the bladders.

Title
Footwear having improved shock absorption
Application Number
6/425437
Publication Number
4446634
Application Date
September 28, 1982
Publication Date
May 8, 1984
Inventor
Robert B Stevenson
6713 E. 66th St., Tulsa, 74133
OK, US
Paul H Johnson
2526 W. Newton, Tulsa, 74127
OK, US
Agent
Head Johnson & Stevenson
IPC
A43B 13/40
A43B 13/20
A43B 13/18
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