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In 1608, Dutch eyeglass maker Hans Lipperhey filed the first patent for a working telescope. The patent was denied.
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| Number | Title | Issue Date |
| 7377229 | Window assembly and method for dropdown feed doors A window assembly and related method for dropdown feed doors and the like includes a rigid marginal frame configured for close reception in an associated opening in the feed door. A mullion has opposite ends connected with top and bottom portions of the frame. A lat... | 05/27/2008 |
| 7107930 | Adjustable cage feeder A feeder for a cage, designed to reduce the scattering of food and to provide a cleaner and healthier caged environment, wherein the cage has a wall and an interior space for housing an animal such as a bird, including a cage door. The feeder comprises a feeder mech... | 09/19/2006 |
| 6928953 | Adjustable cage feeder A feeder for a cage, designed to reduce the scattering of food and to provide a cleaner and healthier caged environment, wherein the cage has a wall and an interior space for housing an animal such as a bird, including a cage door. The feeder comprises a feeder mech... | 08/16/2005 |
