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| Number | Title | Issue Date |
| 5737071 | Method and apparatus for enhancing live-scan fingerprint reader images A method and apparatus for improving the optical boundary between a person's fingerprint ridges and the surface platen of a live-scan-imaging apparatus includes providing an absorbent pad containing chemicals selected from the nonvolatile oils, oil amides... | 04/07/1998 |
| 5395444 | Fingerprint ink dispenser A fingerprint ink dispensing apparatus includes a ceramic disk positioned over an ink reservoir in the form, for example, of a felt pad. The ceramic disk has an average porosity of about 40% and an average pore size of about 5 microns. A colored pigment s... | 03/07/1995 |
| 4983415 | Method of making permanent images on recording surface having a thermosensitive color-developing layer thereon An inkless method of recording an image of a desired object or symbol such as the print of a person's finger is described in which a recording surface is prepared by placing thereon a thermosensitive color-developing layer comprising a chromogenic dye suc... | 01/08/1991 |
| 4917987 | Method of enhancing the resolution of a fingerprint image in a fingerprint recording system A method for enhancing fingerprint images comprises the steps of applying a chemical compound to the fingers to be printed in which the compound contains a first constituent in the form of a conventional ink or inkless reagent. The first constituent is ar... | 04/17/1990 |
| 4182261 | Credit card printer for fingerprints and solutions The present invention comprises a credit card printer apparatus which includes inkless fingerprinting directly on a medium, such as a check or credit card slip. The printer can include a housing or bed having one or more replaceable cartridges with a pair... | 01/08/1980 |
| 4029012 | Two-part inkless applicator for fingerprints The present invention comprises an apparatus for inkless fingerprinting directly on a medium, such as a check. The apparatus can include a stamp housing having a replaceable cartridge with a pair of reservoir resilient foam cell pads having a semi-sealed ... | 06/14/1977 |
