Did You Know...
...that two musicians were responsible for the invention of color print film? Fascinated by photography, Leopold Godowsky and Leopold Mannes worked together to produce an easy-to-use, practical color film. They worked full time as music teachers and gave concerts while experimenting during their off hours in Mannes' kitchen. Their success earned them full-time, well-paying jobs at Kodak and their efforts resulted in Kodachrome film, which was introduced in 1935.
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| Number | Title | Issue Date |
| 5861983 | Microscope for microsurgery In order to minimize the requsite expenditure of energy involved in a positional change of a microscope for the microsurgery mounted on a floor stand or suspended from a ceiling suspension mount that comprises a viewing element (17, an eyepiece (12), an o... | 01/19/1999 |
| 5223864 | Phoropter The phoropter is provided with a rotating knob means for selecting specific types of functions (12,13,14), the angular position being picked up by means of a pulse generator, e.g. a light barrier (8,9) in the form of an electric signal (amplifier 10) and,... | 06/29/1993 |
| 4798966 | Optical sensor arrangement A lower frequency clock signal is supplied to a CCD line sensor. The step-like test signal detected by a scanning circuit is converted by means of a defining circuit and supplied to an evaluation circuit. The position of a light bar on a sensor is accurat... | 01/17/1989 |
| 4385813 | Phoropter Method for obtaining cross cylinder-like actions for using the adjusting or aligning measurement known as the cross cylinder method in phoropters for subjective refraction, wherein the spherical and cylindrical lens discs of the phoropter are adjusted in ... | 05/31/1983 |
| 4209021 | Apparatus for generating and measurement of defined forces for medical appliances An apparatus for the generation and measurement of defined forces independent of position or travel of transmitting members for medical examination appliances wherein a lever pivotable about a horizontal axis in a vertical plane carries a probe adapted to... | 06/24/1980 |
| 4155622 | Microscope with internal focussing A floor or ceiling support mounted microscope for microsurgery wherein the microscope includes an objective of variable intercept length. The objective consists of at least two lens assemblies movable relative to each other. One of the two lens assemblies... | 05/22/1979 |
