Perforated core honeycomb panel and pump system including a panel comprised of a core of perforated, thermoplastic elastomeric honeycomb bonded to and disposed between upper and lower sheets of thermoplastic elastomeric facing material. The core is made from a plurality of advanced grade, ...http://www.google.ca/patents/US5840400?utm_source=gb-gplus-sharePatent US5840400 - Perforated core honeycomb panel system
