| Number | Name | Date | Kind |
|---|---|---|---|
| 3971362 | Pope et al. | Jul 1976 | |
| 4065753 | Paul, Jr. | Dec 1977 | |
| 4262632 | Hanton et al. | Apr 1981 | |
| 4333072 | Beigel | Jun 1982 | |
| 4399821 | Bowers | Aug 1983 | |
| 4463353 | Kuzara | Jul 1984 | |
| 4475481 | Carroll | Oct 1984 | |
| 4510495 | Sigrimis et al. | Apr 1985 | |
| 4514731 | Falck et al. | Apr 1985 | |
| 4618861 | Gettens et al. | Oct 1986 | |
| 4630044 | Polzer | Dec 1986 | |
| 4724427 | Carroll | Feb 1988 | |
| 4739328 | Koelle et al. | Apr 1988 | |
| 4837568 | Snaper | Jun 1989 | |
| 4854328 | Pollack | Aug 1989 | |
| 4865044 | Wallace et al. | Sep 1989 | |
| 4937581 | Balwin et al. | Jun 1990 | |
| 5008661 | Raj | Apr 1991 | |
| 5028918 | Giles et al. | Jul 1991 | |
| 5055659 | Hendrick et al. | Oct 1991 |
| Number | Date | Country |
|---|---|---|
| 9005448 | May 1990 | WOX |
| Entry |
|---|
| Tom Curl, "Electronic Branding is on the Way", Progressive Farmer, p. 52, Jul. 1974. |
| "Destron/IDI" Product brochure (1990). |