New way to hoist

Have a patent already for a napkin holder. Entrepreneur, been in business for myself for 35 years. Older, no 71. Pickup bed hoists all connect in some way to the bed or to the receiver hitch for anchoring. This requires bolting the unit to the inside of the bed or blocking the rear of the bed with a device using the receiver hitch. I keep the general crane/hoist idea but want it anchored on the side of the pickup bed, externally, by driving the rear wheel over a anchor plate.