Issued Patents All Time
Showing 1–13 of 13 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6437863 | Method and apparatus for detecting and measuring conditions affecting color | Darby Simpson Macfarlane, Fred W. Billmeyer, Jr. | 2002-08-20 |
| 6330341 | Method and apparatus for hair color characterization and treatment | Darby Simpson Macfarlane, Fred W. Billmeyer, Jr. | 2001-12-11 |
| 6314372 | Method and apparatus for hair color characterization and treatment | Darby Simpson Macfarlane, Fred W. Billmeyer, Jr. | 2001-11-06 |
| 6308088 | Method and apparatus for detecting and measuring conditions affecting color | Darby Simpson Macfarlane, Fred W. Billmeyer, Jr. | 2001-10-23 |
| 6271920 | Methods and apparatus for color calibration and verification | Darby Simpson Macfarlane, Fred W. Billmeyer, Jr. | 2001-08-07 |
| 6178341 | Color measurement system with color index for skin, teeth, hair and material substances | Darby Simpson Macfarlane, Fred W. Billmeyer, Jr., Hugh Fairman | 2001-01-23 |
| 6157445 | Method and apparatus for detecting and measuring conditions affecting color | Darby Simpson Macfarlane, Fred W. Billmeyer, Jr. | 2000-12-05 |
| 6129664 | Method and apparatus for detecting and measuring conditions affecting color | Darby Simpson Macfarlane, Fred W. Billmeyer, Jr. | 2000-10-10 |
| 6128516 | Method and apparatus for detecting and measuring conditions affecting color | Darby Simpson Macfarlane, Fred W. Billmeyer, Jr. | 2000-10-03 |
| 6067504 | Method for correctly identifying hair color | Darby Simpson Macfarlane, Fred W. Billmeyer, Jr. | 2000-05-23 |
| 5671735 | Method and apparatus for detecting and measuring conditions affecting color | Darby Simpson Macfarlane, Fred W. Billmeyer, Jr. | 1997-09-30 |
| 5313267 | Method and instrument for selecting personal compatible colors | Darby Simpson Macfarlane, Fred W. Billmeyer, Jr. | 1994-05-17 |
| 5311293 | Method and instrument for selecting personal compatible colors | Darby Simpson Macfarlane, Fred W. Billmeyer, Jr. | 1994-05-10 |