Effective March 13, 2018, our KWIC-KLIP® has been officially trademarked. Originally developed and first used in 1980, we are pleased to have this product officially trademarked with US Patent and Trademark Office. More About The KWIC-KLIP® KWIC-KLIP® extrusions are used to attach poly to greenhouses and are reusable For easy use on baseboards or bows Unbeatable … Continue reading The Greenhouse Company’s KWIC-KLIP® Product is Trademarked