1
Jean Pierre Vermeulen: Shock absorbing system for footwear application. Riches McKenzie & Herbert, March 19, 1991: US04999931 (204 worldwide citation)

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. ...


2
Jean Pierre Vermeulen: Shoe sole containing discrete air-chambers. George H Riches, September 23, 1980: US04223455 (50 worldwide citation)

A novel shoe incorporating a new sole and wedge-shaped arch support. The sole includes a plurality of sealed alveoli or air-chambers of different shapes which provide sufficient flexibility and resiliency to the shoe to reduce many of the common problems encountered by athletes. The alveoli are seal ...