A clean room ceiling grid system having a detent means for loading filter panels into ceiling grids from a clean room. The system is operable to permit removal of the filter panels by use of a filter panel removing tool. More particularly, this clean room ceiling grid system requires no plenum space...http://www.google.fr/patents/US4819549?utm_source=gb-gplus-shareBrevet US4819549 - End seal for clean room ceiling supports
