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 |
| 6803022 | Device and method for separating components of a fluid sample A device and method for separating heavier and lighter fractions of a fluid sample. The device includes a plurality of constituents comprising a container and a composite element in the container. The composite element is a separator comprising a deformable bellows,... | 10/12/2004 |
| 5851397 | Auxiliary apparatus for sampling blood serum An auxiliary apparatus for sampling blood serum according to the invention comprises a disklike flattening member having a flat surface and capable of flattening a separation surface of a blood serum separating medium contained in a sample container by ur... | 12/22/1998 |
| 5647272 | Bucket extractor device An extractor device for extracting, filtering, measuring, and containing a subsurface portion of liquid soup, which having less fat content mixed than a surface area, from a soup pot in a single dipping application; comprising: A cylinder, container body ... | 07/15/1997 |
| 4464265 | Valve device for stock/sauce skimmer and the like A valve device for stock/sauce skimmer and the like is provided and comprises a container in which is stored liquid to be separated from fats and solids contained in the liquid, a cylinder extending down from the container having a passage for the liquid,... | 08/07/1984 |
| 4439319 | Receptacle for the collection of medical specimens and the like A double-walled receptacle formed of inner and outer open-topped containers, the inner one fitting within the outer so as to be upwardly removable therefrom. The inner container is divided into upper and lower compartments by a foraminous partition and th... | 03/27/1984 |