Bizarre Patents
Pizza Pie With Concentric Rings of Crust
A pizza mold for forming a plurality of concentric raised ridges of dough (i.e., crust) on the surface of a pizza pie.
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| Number | Title | Issue Date |
| 4472176 | Apparatus and method for the production of pure hydrogen from a hydrogen-containing crude gas An apparatus and method are disclosed for the production of pure hydrogen-containing crude gas. The apparatus, in the event of an interruption in power, is easily and rapidly purged of hydrogen. The apparatus includes a passage defined at least in part by... | 09/18/1984 |
| 4056373 | Hydrogen-purification apparatus with palladium-alloy filter coil A hydrogen-purification filter has a closed chamber with a pure-hydrogen outlet. A coil made of thin palladium-alloy tubing is contained in this chamber and has an inlet end and an outlet end accessible from outside the chamber. This coil is of D-section ... | 11/01/1977 |
