| Patent Number |
Title Of Patent |
Date Issued |
| 5180624 |
Ink jet recording paper |
January 19, 1993 |
| This invention concerns an ink jet recording paper characterized by comprising a base layer that contains an internal size, and an ink-receptive layer that is made out of a material having good affinity for inks, wherein the ink-receptive layer is superposed on either one or both sid |
| 5165973 |
Ink jet recording sheet |
November 24, 1992 |
| An ink jet recording sheet providing an image by the use of an aqueous ink containing a water-soluble dye comprises a substrate having thereon a specific ink receptive layer. This ink jet recording sheet has excellent properties under maintaining the paper-like figure and feeling of an |
| 4937802 |
Magnetic head drive circuit |
June 26, 1990 |
| A magnetic head drive circuit for driving a coil of the magnetic head performing opto-magnetic recording, is disclosed. According to the present invention, the switching elements are actuated on the basis of driving signals for commutatingly connecting three power sources presenting thre |
| 4830911 |
Recording sheet for ink jet printers |
May 16, 1989 |
| This invention relates to a recording sheet for ink jet printers which gives an image by the use of an aqueous ink containing a water-soluble dye, coated or impregnated with either of or a mixture of two kinds of water-soluble polymers: one whose polymeric unit is alkylquaternaryammo |
| 4651239 |
Method and apparatus for recording a digital information signal |
March 17, 1987 |
| In a system for recording and reproducing digital signals on a magnetic tape using a rotary head, in which the signals are recorded as a series of slanted tracks without guard bands between adjacent slanted tracks, a pilot signal that was recorded during the recording process is used to |
| 4650714 |
Ink jet recording sheet |
March 17, 1987 |
| An ink jet recording sheet for overhead projection or blue copy comprising on a transparent or translucent support an ink-absorbing layer which is made by coating an organic solvent which contains a denatured polyethylene oxide being soluble in the organic solvent and having a water abso |
| 4478910 |
Ink jet recording paper |
October 23, 1984 |
| Ink jet recording paper comprising on a base sheet with a specific sizing degree a coating layer comprising a water-soluble polymeric binder and particular fine silica particles, wherein the sheet provides a superior aptitude for high speed recording with excellent optical density and |
