Did You Know...
...that after Parker Brothers executives turned down the game of Monopoly because it had "52 fundamental errors" (including taking too long to play), a copy of the game wound up in the home of the company president who stayed up until 1 a.m. to finish playing it? He was so impressed by the game that the next day he wrote to inventor Charles Darrow and offered to buy it!
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| Number | Title | Issue Date |
| 4472036 | Progressive multi-focal lenses A progressive multi-focal lens is provided of the type having a distant viewing zone, a near viewing zone, and a progressive zone therebetween. The surface refractive power increases vertically from an upper portion of the lens to a lower portion as the l... | 09/18/1984 |
| 4217736 | Method for automatically grinding lenses An improved automatic lens grinding machine and process for shaping lenses to fit any particular glasses frame. The machine includes a recording assembly by which the pattern of a glasses frame which will hold a lens is recorded on a heat or photosensitive ... | 08/19/1980 |
| 4128303 | Anti reflection coating with a composite middle layer A reflection free optical glass coated, in succession, with a medium refractive index layer, such as CeF3 or Al2 O3, a high refractive index layer such as TiO2, CeO2 or ZrO2 which layer con... | 12/05/1978 |
| 4096684 | Automatic lens grinding machine An improved automatic lens grinding machine and process for shaping lenses to fit any particular glasses frame. The machine includes a recording assembly by which the pattern of a glasses frame which will hold a lens is recorded on a heat or photosensitive ... | 06/27/1978 |
| 4021102 | Auto-refractometer An auto-refractometer according to this invention comprises a light beam source for producing a measuring ray wherein beams from a pair of invisible infrared ray emission diodes are alternately flickered, and real images of the beams are converged on resp... | 05/03/1977 |
| 3978386 | Servo system for finishing objects materials A servo system to permit the lens finishing for example, corresponding to a registered pattern and permit such finishing at desired pressure, etc. for the conveniences of the easy and effective grinding and finishing, in a manner that the detectors supply... | 08/31/1976 |
| 3953130 | Automatic digital indicating lens meter An automatic digital indicating lens meter is provided with an optical system having a light beam source and a target which reciprocally moves within a certain range along the optical axis, the target having several circular luminous points. An image pick... | 04/27/1976 |
