Cohen; Allen L.
Patent Applications and Registrations
Patent applications and USPTO patent grants for Cohen; Allen L..The latest application filed is for "game controller for infants".
- Cohen; Allen L. - Richmond VA
- Cohen; Allen L. - Columbia MD
| Patent | Date |
|---|---|
| Game controller for infants Grant 6,025,830 - Cohen February 15, 2 | 2000-02-15 |
| Game controller for infants Grant 5,751,273 - Cohen May 12, 1 | 1998-05-12 |
| Diffractive multifocal optical device Grant 5,144,483 - Cohen * September 1, 1 | 1992-09-01 |
| Diffractive multifocal optical device Grant 5,121,979 - Cohen June 16, 1 | 1992-06-16 |
| Small aperture multifocal Grant 5,121,980 - Cohen June 16, 1 | 1992-06-16 |
| Multifocal optical device with spurious order suppression and method for manufacture of same Grant 5,120,120 - Cohen June 9, 1 | 1992-06-09 |
| Diffraction bifocal with adjusted chromaticity Grant 5,117,306 - Cohen May 26, 1 | 1992-05-26 |
| Optic zone phase channels Grant 5,056,908 - Cohen * October 15, 1 | 1991-10-15 |
| Progressive intensity phase bifocal Grant 5,054,905 - Cohen October 8, 1 | 1991-10-08 |
| Multifocals using phase shifting Grant 5,017,000 - Cohen May 21, 1 | 1991-05-21 |
| Multifocal optical device with novel phase zone plate and method for making Grant 4,995,714 - Cohen February 26, 1 | 1991-02-26 |
| Diffractive multifocal optical device Grant 4,995,715 - Cohen February 26, 1 | 1991-02-26 |
| Contact lens with cosmetic pattern Grant 4,889,421 - Cohen December 26, 1 | 1989-12-26 |
| Progressive intensity phase bifocal Grant 4,881,805 - Cohen November 21, 1 | 1989-11-21 |
| Multifocal phase plate with a pure refractive portion Grant 4,881,804 - Cohen November 21, 1 | 1989-11-21 |
| Cosmetic artificial nails Grant 4,876,121 - Cohen October 24, 1 | 1989-10-24 |
| Phase shift multifocal zone plate Grant 4,340,283 - Cohen * | 1982-07-20 |
| Multifocal phase place Grant 4,338,005 - Cohen * July 6, 1 | 1982-07-06 |
| Multifocal zone plate Grant 4,210,391 - Cohen July 1, 1 | 1980-07-01 |
| Zonal bifocal contact lens Grant 4,162,122 - Cohen July 24, 1 | 1979-07-24 |
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