Issued Patents All Time
Showing 1–25 of 25 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10759301 | Systems and methods for reducing current drain in batteries | Thean Song Ooi, Amy T. Herrmann, Kow Chee Chong, Roger L. Boyer, Muhamad Ridzuan Azizan +5 more | 2020-09-01 |
| 9985694 | Methods and systems for contactless battery discharging | Edward Brumley, John E. Herrmann | 2018-05-29 |
| 9843220 | Method and apparatus for operating an internal charger system of a portable electronic device | John E. Herrmann, Peter J. Bartels, Roy L. Kerfoot, Jr. | 2017-12-12 |
| 9209676 | Method and apparatus for charging batteries having different voltage ranges with a single conversion charger | — | 2015-12-08 |
| 9097775 | Apparatus and method for discharging a battery and determining a condition of the battery | Roy L. Kerfoot, Jr., John E. Herrmann | 2015-08-04 |
| 8659263 | Power supply circuit having low idle power dissipation | John Wendell Oglesbee, Dipti V. Desai, John E. Herrmann | 2014-02-25 |
| 7145313 | Battery protection circuit for simulating an overcurrent condition based on battery current flow | Jennifer K. Collier, John E. Herrmann | 2006-12-05 |
| 7096047 | Electronic audio accessory for use with automotive stereo loudspeakers | Reed William Leonard, Alay M. Mehta | 2006-08-22 |
| 7068012 | Atmospheric explosive battery protection circuit having a robust protection system | Jennifer K. Collier, John E. Herrmann | 2006-06-27 |
| 7027604 | Circuit to prevent acoustic feedback for a cellular speakerphone | Kee Eng Soo, Ashok Patil, Macwien Krishnamurthi Annamalai | 2006-04-11 |
| 6956487 | Battery charging status indication circuit | John E. Herrmann | 2005-10-18 |
| 6903533 | Power fault battery protection circuit | Roger L. Boyer, John E. Herrmann, Jenny Collier | 2005-06-07 |
| 6879517 | Battery circuit with three-terminal memory device | Joseph Patino | 2005-04-12 |
| 6879133 | Battery protection circuit | — | 2005-04-12 |
| 6819083 | Dual use thermistor for battery cell thermal protection and battery pack overcharge/undercharge protection | Joseph Patino | 2004-11-16 |
| 6771051 | Thermally limited battery protection and charging circuit | John Wendell Oglesbee, John E. Herrmann, David M. DeMuro, Roger L. Boyer | 2004-08-03 |
| 6400587 | Universal input flyback with secondary shunt voltage limiter | Ashok Patil | 2002-06-04 |
| 6307758 | Transformer secondary disconnect | — | 2001-10-23 |
| 6127804 | Lithium ion charging means and method using ionic relaxation control | John Wendell Oglesbee, John E. Herrmann | 2000-10-03 |
| 6100664 | Sub-miniature high efficiency battery charger exploiting leakage inductance of wall transformer power supply, and method therefor | John Wendell Oglesbee | 2000-08-08 |
| 6091229 | Sub-miniature high efficiency battery charger system and method | John Wendell Oglesbee | 2000-07-18 |
| 6054843 | High speed battery charging system with high accuracy voltage sensing | John Wendell Oglesbee, Joseph Patino | 2000-04-25 |
| 5969508 | Battery charging method using battery circuitry impedence measurement to determine optimum charging voltage | Joseph Patino, Barbara R. Doutre | 1999-10-19 |
| 5705915 | Method for charging a battery | Twanika D. Douglas, Joseph Patino, William R. Williams | 1998-01-06 |
| 5694025 | Battery charger with control circuit | John Wendell Oglesbee | 1997-12-02 |