In 1608, Dutch eyeglass maker Hans Lipperhey filed the first patent for a working telescope. The patent was denied.
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| Application No. | Application Title | Issue Date |
| 20110209281 | METHOD AND SYSTEM FOR RAPID AND CONTROLLED ELEVATION OF A RAISABLE FLOOR FOR POOLS A rapid elevation floor system for a pool at least partially filled with pool water, including a raisable floor for disposing over the bottom of the pool. The raisable floor is combined of a plurality of modular floor elements, at least some of which include a ballastin... | 09/01/2011 |
| 20110131719 | MULTIPURPOSE BENDABLE POOL A within-ground portable pool, particularly well suited as a sand pool in a beach environment is disclosed. Importantly, the portable pool has a bendable structure wherein children can develop creative skills by bending the structure into various shapes and designs. Add... | 06/09/2011 |
| 20100199416 | SELF-CONTAINED LIFTING MODULE FOR THE MOBILE BOTTOM OF A SWIMMING POOL A lifting module for the mobile rigid bottom of a swimming pool, including: a) a driving housing controlling the immersion and lifting movements at a single point of the mobile bottom; b) at least one peripheral guiding member of the mobile bottom; c) at least one trans... | 08/12/2010 |
| 20090235446 | MOVABLE FLOOR SYSTEM FOR SWIMMING POOL A movable floor system for a swimming pool, including a structural platform comprising a horizontal frame designed to support a finished covering, the platform being designed to be installed in a cavity acting as the swimming pool. The system includes a lifting mechanis... | 09/24/2009 |
| 20070271693 | Movable Floor Pool and Method of Cleaning Movable Floor Pool A movable floor pool in which the space under a movable floor formed under the movable floor can be kept clean and a method of cleaning the movable floor pool is provided. The movable floor pool (1) has a pool body (10) for c... | 11/29/2007 |
| 20070256228 | Profile Designed for the Construction of a Floor for a Pool and Capable of Floating and Being Immersed A profile for assisting in the construction of a pool floor is capable of floating or being immersed. At least one internal ballast cavity crosses the profile longitudinally. The profile has first and second ends sealed respectively by first and second end pieces having... | 11/08/2007 |