04999931 is referenced by 207 patents and cites 12 patents.

This invention relates to a new shock absorber which may be used as an insole or as a midsole for an article of footwear. The shock absorber comprises a multi-cell membrane which may be embedded in a flexible envelope or which may be used itself as a one-piece multi-cell membrane insole or midsole. The shock absorber exhibits improved shock absorbing characteristics which increases the comfort of the wearer of the shoes and reduces damage to the foot during athletic exercises.

Title
Shock absorbing system for footwear application
Application Number
7/312729
Publication Number
4999931
Application Date
February 21, 1989
Publication Date
March 19, 1991
Inventor
Jean Pierre Vermeulen
2489 Queen St. E., Toronto, Ontario
CA
Agent
Riches McKenzie & Herbert
IPC
A43B 13/20
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