Issued Patents 1997
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5686786 | Light bulb with glass envelope having light transmission of a wavelength only up to 700mm | John B. Hartley, Ralph E. Johnson | 1997-11-11 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5686786 | Light bulb with glass envelope having light transmission of a wavelength only up to 700mm | John B. Hartley, Ralph E. Johnson | 1997-11-11 |