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| Number | Title | Issue Date |
| 6027556 | Nonstaining fingerprint ink and applicator therefor A nonstaining fingerprint ink is formulated from one or more alcohol soluble dyes, e.g., Acid Black 5 dye, dissolved in one or more fatty acid esters which have at least one available hydroxyl group, e.g., glycerol monoricinoleate, the dye constituting ab... | 02/22/2000 |
| 5919292 | Fingerprint ink A fingerprint ink is formulated from a solvent carrier and a low structure carbon dispersion. Carbon particles with an agglomerate size of less than 100 millimicrons are dispersed in a hydrocarbon soluble oleo resin to form the low structure carbon disper... | 07/06/1999 |
