In 2004 Thomas Magdi patented a machine for changing light bulbs:

A light bulb changer method and apparatus that contains components that allows for instantly detecting a burned out light, automatically removing the burned out light, and automatically replacing the burned out light with a replacement bulb. The changer operates without human intervention, and can be assembled from a kit having a light fixture, detecting sensor, removing and replacement hardware.

The 23-page patent abstract contains 24 figures diagramming 97 components.

Why is this funny?