Number | Name | Date | Kind |
---|---|---|---|
3363253 | Ratkevich et al. | Jan 1968 | |
3496568 | Palumbo et al. | Feb 1970 | |
3541551 | Bystrom, Jr. et al. | Nov 1970 | |
3860933 | Terakawa et al. | Jan 1975 | |
4027303 | Neuwirth et al. | May 1977 | |
4191953 | Woode | Mar 1980 | |
4219802 | Ceseri | Aug 1980 |
Number | Date | Country |
---|---|---|
1266344 | Mar 1972 | GBX |
Entry |
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"Installation & Alignment Manual for Microwave Security System, Racon Series 13000", by Racon, Inc., 1977. |