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Your search returned 39 patents.
( 342/448 in Current US Classification ) |
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| Patent ID | Title | Date Filed |
| 4675683 | Spent hunting arrow locating means
| March 28, 1985 |
| 4613866 | Three dimensional digitizer with electromagnetic coupling
| May 13, 1983 |
| 4573053 | Automatic direction finder
| December 6, 1982 |
| 4314252 | Preamplifier for ADF loop antenna
| November 14, 1980 |
| 4207572 | Sky wave DF antenna system
| October 25, 1977 |
| 4158843 | Automatic direction finder antenna preamplifier processor
| January 23, 1978 |
| 4054881 | Remote object position locater
| April 26, 1976 |
| 4040058 | Direction finder
| March 4, 1975 |
| 1 |
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