Issued Patents All Time
Showing 1–12 of 12 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6230661 | External battery arrangement for electronic containment systems | Robert G. Yarnall, Jr. | 2001-05-15 |
| 6201477 | Switched capacitor power supply for an electronic animal containment system | Robert G. Yarnall, Jr. | 2001-03-13 |
| 6147610 | External deterrent arrangement for electronic containment systems | Robert G. Yarnall, Jr. | 2000-11-14 |
| 5844489 | Electronic confinement system for animals or people transmitting digitally encoded signals | Robert G. Yarnall, Jr. | 1998-12-01 |
| 5808551 | Electronic confinement system for animals or people transmitting digitally encoded signals | Robert G. Yarnall, Jr. | 1998-09-15 |
| 5781113 | Electronic confinement system for animals using modulated radio waves | Robert G. Yarnall, Jr. | 1998-07-14 |
| 5769032 | Method and apparatus for confining animals and/or humans using spread spectrum signals | Robert G. Yarnall, Jr. | 1998-06-23 |
| 5610588 | Electronic confinement system for animals using modulated radio waves | Robert G. Yarnall, Jr. | 1997-03-11 |
| 5565850 | Electronic confinement system for animals using modulated radio waves | Robert G. Yarnall, Jr. | 1996-10-15 |
| 5170149 | Confinement arrangement for animals | Robert G. Yarnall, Jr. | 1992-12-08 |
| 4745882 | Electronic confinement and communications arrangement for animals | Robert G. Yarnall, Jr. | 1988-05-24 |
| 4733633 | Electronic confinement arrangement for animals | Robert G. Yarnall, Jr. | 1988-03-29 |