<Tr> <Td> 1993 </Td> <Td> George Levitt and Marinus Los </Td> <Td> "For their independent contribution to the discovery and commercialization of environmentally friendly herbicides to help ensure an abundant food supply for a growing world population ." </Td> </Tr> <Tr> <Td> 1993 </Td> <Td> Hans W. Liepmann </Td> <Td> "For his outstanding research contributions to the field of fluid mechanics and for his devotion for over 40 years to the education of the world's leaders in aeronautical engineering ." </Td> </Tr> <Tr> <Td> 1993 </Td> <Td> William D. Manly </Td> <Td> "For his outstanding success in the development and processing of advanced high - temperature and high - performance materials, and the transfer of this technology to a variety of American industries ." </Td> </Tr> <Tr> <Td> 1993 </Td> <Td> Kenneth H. Olsen </Td> <Td> "For his contributions to the development and use of computer technology ." (Digital Equipment Corporation--DEC) </Td> </Tr>

When was concentrix awarded with the silver medal for best technology innovation