Recently patented a tool and process which allows a user (residential and commercial) to change an air filter located in the ceiling without a ladder. For the last time a ladder is needed to convert the filter grill (no other tools needed), after this it only takes 20 seconds to change the filter. This tool works with all sizes of fibreglass and pleated filters, is adjustable to reach over furniture or other obstacles. See the video at 123inventions.com page 14, Contact Robert. I would appreciate feedback and questions. I am seeking a manufacturer to license this too or an investor.