Quotables
"To place a man in a multi-stage rocket and project him into the controlling gravitational field of the moon where the passengers can make scientific observations, perhaps land alive, and then return to earth--all that constitutes a wild dream worthy of Jules Verne. I am bold enough to say that such a man-made voyage will never occur regardless of all future advances."
Lee deForest, American radio pioneer ; 1957
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| Number | Title | Issue Date |
| 5985632 | Peptide amidase from xanthomonas A plant peptide amidase from the flavedo of oranges is known; this can be obtained only in small quantities and is seasonal. The proposed new enzymes are microbial peptide amidases which can be obtained from micro-organisms recovered from soil samples in ... | 11/16/1999 |
| 5584699 | Computerized system for teaching geometry proofs A system for teaching proofs, including a set of playing cards and a playing field electronically displayed on a computer game screen. The playing field includes two boxes labelled "GIVEN" and "CONCLUSION" for entry of a premise and a conclusion from a th... | 12/17/1996 |
| 5281145 | Pictorial image transforming manipulatives The pictorial image transforming manipulatives are instructional visual aid devices adapted for use to demonstrate visually the applications of deductive reasoning in proving most of the geometry theorems in conjunction with a geometry course. The manipul... | 01/25/1994 |
| 5219289 | Mathematical teaching aid A mathematical teaching aid or game comprising a background grid having components and subcomponents each positioned within individual cells of the grid so that many mathematical arrangements and concepts can be displayed. Each component has a face color ... | 06/15/1993 |
| 5084819 | Data collection, analysis, and response system and method An expert data collection, analysis, and response system and method for providing user specific recommendations in a predetermined topic, including reading a data collection form which contains responses to questions in the predetermined topic and based o... | 01/28/1992 |
| 4137652 | Apparatus for verification of the Pythagorean theorem A didactical aid for the teaching of geometry and, more particularly, an apparatus is provided which allows the experimental verification of the Pythagorean theorem on an infinite number of right triangles obtained by varying the acute angles formed by th... | 02/06/1979 |
