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 |
| 4225252 | Character selection for single element printer There is disclosed a selection mechanism for a single element printer comprising an operating link connected with the print element for the driving rotation thereof and having a first and a second input portion, and a modifying member having the link moun... | 09/30/1980 |
| 4066160 | Single element imprinting assembly with inertially and kinematically independent motion controls A single element imprinting assembly of the disk, cylindrical or spherical type for use in typewriters and the like is provided with a stationary printing assembly having kinematically independent controls for character selection and imprinting movements ... | 01/03/1978 |
| 4008794 | Type carrier print deflection blocking means for a single-element printer A single-element type carrier printing mechanism is provided with an element movable to block tangential deflection of the type carrier at printing impact with the platen, is normally disengaged from frictional contact with the type carrier during rotatio... | 02/22/1977 |
| 3941229 | Serial printing device A serial printing device comprises a type drum rotatably mounted on a carriage which can move parallely to a platen. On the periphery of the type drum are mounted a plurality of character-bearing elements urged against the drum by biasing means. A steppin... | 03/02/1976 |