Bizarre Patents
A method of swing on a swing is disclosed, in which a user positioned on a standard swing suspended by two chains from a substantially horizontal tree branch induces side to side motion by pulling alternately on one chain and then the other.
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| Number | Title | Issue Date |
| 5069235 | Apparatus for cleaning and rinsing wafers Apparatus for cleaning and rinsing wafers is disclosed. The apparatus includes an inner tank contained within an outer tank. The inner tank has an open top forming a weir edge around the entire top of the tank. A bottom opening in the inner tank is covere... | 12/03/1991 |
| 4997490 | Method of cleaning and rinsing wafers A method for cleaning and rinsing wafers used in the production of integrated circuits is disclosed. The wafers are submerged in a tank containing deionized water and the method includes repeated cycles comprising the steps of (1) introducing deionized wa... | 03/05/1991 |
