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...that after Walter Hunt patented the safety pin in 1849, he sold the rights to it for $400?
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| Number | Title | Issue Date |
| 6958119 | Mobile phase gradient generation microfluidic device The present invention relates to a microfluidic device for separating the components of a fluid sample. A cover plate is arranged over the first surface of a substrate, which, in combination with a microchannel formed in the first surface, defines a separation condu... | 10/25/2005 |
| 5353049 | Paper holder of video printer A paper holder assembly has an axle coaxially positionable to extend axially outwardly from axially opposite bases of a platen drum providing a circumferential outer surface disposed between the opposite bases, the axle has circumferential grooves termina... | 10/04/1994 |
| 4849776 | Electrostatic printer for digitized images or data An electrostatic drum printer having a linear array of charging elements scanning a sheet of paper with a helical stripe pattern. The head is supported on a lead screw which advances the head as the drum rotates. The head writes an electrostatic latent im... | 07/18/1989 |
| 4732613 | Recording liquid A liquid composition is provided which contains a water-soluble dye and a solvent, and the liquid composition has a total concentration of divalent and higher valent metals at 20 ppm or less, and a magnesium concentration is preferably 4 ppm or less. An i... | 03/22/1988 |
| 4527171 | Thermal transfer printing employing a binder In thermal ink transfer printing, a layer of thermally fusable binder is deposited on a recording sheet prior to the transfer print of thermally fusable ink from a transfer sheet to provide a strong bond between the underlying recording sheet and the over... | 07/02/1985 |
| 4358778 | Adjustable blade for facsimile recording machine The facsimile recording machine having a loop electrode which moves along its own locus, a portion of which includes a linear track. The linear track is opposed by a scanning electrode, between which, a printout is produced on a web.The linear track in wh... | 11/09/1982 |
| 4290705 | Electromagnetic interference reduction for electronic line printers An electronic line printer characterized by reduced electromagnetic interference, comprising a printer chassis including record medium storage means; a platen mounted on said chassis and adapted to be in contact with the record medium; electronic printing... | 09/22/1981 |
| 4278019 | All-points addressable dot printer An all-points addressable dot printer has rows of sloped parallel anvils on a rotating drum. Alternate rows slope in opposite directions for bi-directional printing with a single row of hammer blades. The blades which are spaced apart, are shifted bi-dire... | 07/14/1981 |
| 4273040 | Segmented drum bar helix printer Disclosed is an improved form of a mosaic printer of the bar helix type. The helical raised threads on the printer drum instead of being continuous are broken into segments which are offset axially on the drum. This produces a significant increase in thro... | 06/16/1981 |
| 4263847 | Printing mechanism for dot matrix impact printers A dot matrix impact printer of the type which has a platen having a helical projection, a plurality of hammers arranged in the axial direction of the platen to cross the helical projection, and means for feeding an ink to the periphery of the helical proj... | 04/28/1981 |
| 4227452 | Printing machine A printing machine comprising a cylindrical applicator has a spiral groove formed on the peripheral surface and is rotatable. A doctor blade used to wipe away excess ink and to insure adequate ink in the grooves. Electrodes are provided opposite the groov... | 10/14/1980 |
| 4219825 | Electric actuating device A printing device for chronocomparators comprising a striker, an ironless cylindrical coil mounted for rotation in an air gap of a magnetic circuit and connected to the striker, the magnetic circuit being formed by a permanent magnet placed inside the coi... | 08/26/1980 |
| 4205323 | Paper feed control The resolution of an image that is produced by a graphic recorder is related to the rate that recording paper passes through a recording zone and the sweep rate is related to the rate at which a scanning electrode contacts the recording paper. According t... | 05/27/1980 |
| 3956754 | Facsimile apparatus with reciprocating printing bar In a facsimile receiver access to the paper supply roll and other internal elements is facilitated by supporting the guide roller, printing bar and presser-roller on a chassis that is pivotable around the axis of the supply roll from a first position in w... | 05/11/1976 |
| 3948168 | Digital printer A printer for printing in alpha-numeric character form information from a digital source available in the form of a video-type signal representative of alpha-numeric characters corresponding to the digital information. The printer utilizes a high speed ro... | 04/06/1976 |
| 3939481 | Facsimile receiver having movable printing bar In a facsimile receiver wherein the printing bar is mounted for reciprocal movement between an operative position against the drum carrying the printing helix and an inactive position remote therefrom, means is provided for automatically displacing the pr... | 02/17/1976 |
