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Magician Harry Houdini patented a "Diver's Suit" enabling the wearer to "quickly divest himself of the suit while being submerged and to safely escape and reach the surface of the water."
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| Number | Title | Issue Date |
| 4257300 | Apparatus for defacing paper money and similar securities There is disclosed an apparatus for punching packages of paper money and other securities for defacing them, the apparatus preventing the sticking together of individual sheets of said packages in order to permit a subsequent mechanical counting of the pu... | 03/24/1981 |
| 4244255 | Article slotting apparatus An article slotting apparatus that includes a base member and a vertical support member, with a fixed platen connected at its rear edge area to the support member. Movable posts pass slidably through bores in the fixed platen and are connected at first en... | 01/13/1981 |
| 4144785 | Parting tool A punch and die assembly specifically adapted for use as a parting tool is disclosed. The punch has a working tip of rectangular cross section formed with a radius curved convex shear bottom. The punch mates with the die such that the punch side wall to d... | 03/20/1979 |
| 4079647 | Sheet punching apparatus Apparatus for use with a pair of thermoplastic strips of the type illustrated in U.S. Pat. No. 3,608,117 wherein one strip is formed with studs longitudinally spaced at intervals and a second strip apertured and counterbored at the same intervals is used ... | 03/21/1978 |
| 4002092 | Compound angle cutting edge and method of using same A novel compound angle cutting edge configuration on a die rule, slitter blade, hollow punches, shearing blades, etc. provides cleaner cuts on stock material with less tonnage, improved cutting and cleaner cuts. The die rule cutting edge includes a plural... | 01/11/1977 |
