Issued Patents 2011
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| RE42237 | Active mode line voltage regulator for ringing subscriber line interface circuit | Douglas Youngblood | 2011-03-22 |
| RE42123 | Programmable subscriber line circuit partitioned into high voltage interface and digital control subsections | Douglas Youngblood, Edward Berrios | 2011-02-08 |