Bizarre Patents
Pet Toilet-Like Water Disk and Food Storage
One pet-friendly inventor patented "a device for watering pets, e.g., a dog or cat." The device, he helpfully noted, "has the general shape of a toilet."
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| Number | Title | Issue Date |
| 4740064 | Zoom lens apparatus A zoom lens apparatus comprises sensors for detecting relative positions of a variable power lens group and a compensating lens group, a memory for pre-storing compensating data peculiar to the zoom lens apparatus, a control circuit and driving parts for ... | 04/26/1988 |
| 4179191 | Adjusting mechanism for optical objective with lost-motion zone In order to establish a predetermined position of focusing or focal-length adjustment for an optical objective, a mechanism for the axial shifting of one or more lens members has a lost-motion zone in its operating range in which a continuing displacement... | 12/18/1979 |
| 4043642 | Zoom lens system having electrical control of moving elements From an object side, there are a fixed lens, a first movable lens, a second movable lens, and a fixed lens being positioned in that order, wherein the first movble lens is coupled with a first position detecting means and the second movable lens is couple... | 08/23/1977 |
| 4002405 | Variable speed control for zooming A variable speed drive for controlling the movement of the zoom component of a zoom lens system such that the speed of zooming will be proportional to the amount of manual displacement of a control member. The same manually operable control member which c... | 01/11/1977 |
