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 |
| 4024721 | Method and apparatus for laying pipes in the ground There is disclosed a method and apparatus for laying small-diameter gas, water pipes or the like precisely in the ground. Small-diameter pilot pipes are first laid in while at the same time, a pilot head is measured and controlled to make its straight adv... | 05/24/1977 |
| 4020641 | Method of laying pipes in the ground There is disclosed a method of laying small-diameter pipes such as gas, water pipes or the like precisely in position in the ground. Small-diameter pilot pipes are first laid in with a pilot head being measured and controlled in order to make its advance ... | 05/03/1977 |
| 4016942 | Method and apparatus for indicating the position of one well bore with respect to a second well bore A compression wave type signal of a selected frequency is transmitted into the ground at the bottom of a well bore being drilled. The signal is picked up by four microphones that are positioned in another well bore. The microphones have a known orientatio... | 04/12/1977 |
| 4009579 | Method for constructing a tunnel or underpass Method of constructing a tunnel under an existing structure, such as railroad tracks, without disruption of the existing structure, i.e. without interrupting railroad service on the tracks and without requiring construction of expensive track run arounds.... | 03/01/1977 |
| 3949815 | Shallow-hole kerf boring machine with auger on side-arm elevating assembly An augering machine and method for underground mining of minerals by selectively cutting shallow cylindrical kerfs into the face of a mine entry, comprising a wheeled vehicle having an independently elevatable side arm which carries a cutter head and an a... | 04/13/1976 |
| 3945443 | Steerable rock boring head for earth boring machines A portable earth boring machine for the horizontal boring of shafts and the insertion of pipeline casing sections in installations where excavation from the surface is undesirable. The machine is characterized by a steering head particularly adapted for r... | 03/23/1976 |
