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| Number | Title | Issue Date |
| 6652103 | Reflective-type liquid crystal projection system A reflective-type liquid crystal projection system consists of a dichroic prism that diffracts the light beam generated by a light source module into two colored light beams of different wavelengths; and three polarizing light flux splitter prisms that ar... | 11/25/2003 |
| 4063465 | Magazine feeding mechanism for dual slide projectors Mechanism for feeding a picture slide magazine in such a way that picture slides can be taken out of the magazine in the same order in which they are placed in the magazine, for delivery to two separate projector units of a dual slide projector, and then ... | 12/20/1977 |
