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| Patents Granted on 1989-09-05 | |||||
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| Number | Date | Patentee | Title | Type | |
| 4,862,821 | Sep. 05, 1989 | R. Ballantyne | Mechanism for tensioning a moving chain | boats and ships | |
| 4,863,267 | Sep. 05, 1989 | M.A. Norris, E.S. Wahoski, R.B. Bendickson | Fiber Optic Toe/Track Measurement System | ||