This invention was made as a result of work under Lyndon B. Johnson Space Center Contract No. NAS 9-17743 awarded by the National Aeronautics and Space Administration. The government has certain rights in this invention.
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3573107 | Paris et al. | Mar 1971 | |
3989538 | Roth et al. | Jan 1976 | |
4328291 | Wimsel | May 1982 | |
4554222 | Zaromb | Nov 1985 |
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