Brown; Harvey A.
Patent Applications and Registrations
Patent applications and USPTO patent grants for Brown; Harvey A..The latest application filed is for "thermographic system using naphthoylated leuco phenazine dyes".
- Brown; Harvey A. - Lake Elmo MN
| Patent | Date |
|---|---|
| Thermographic system using naphthoylated leuco phenazine dyes Grant 4,563,415 - Brown , et al. January 7, 1 | 1986-01-07 |
| Helichromic-smectic liquid crystal compositions and display cells Grant 4,514,045 - Huffman , et al. April 30, 1 | 1985-04-30 |
| Helichromic compounds and displays Grant 4,394,070 - Brown , et al. July 19, 1 | 1983-07-19 |
| Electro-optical devices containing methine arylidene dyes Grant 4,105,299 - Huffman , et al. August 8, 1 | 1978-08-08 |
| Acutance agents for use in thermally-developable photosensitive compositions Grant 4,088,497 - Brown , et al. May 9, 1 | 1978-05-09 |
| Acutance agents for use in thermally-developable photosensitive compositions Grant 4,033,948 - Brown July 5, 1 | 1977-07-05 |
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