| 9011692 |
Method for removal of volatile phosphates from hydrocarbons |
— |
2015-04-21 |
| 8636905 |
Method for removal of volatile phosphates from hydrocarbons |
— |
2014-01-28 |
| 5905623 |
Telephone and data overvoltage protection apparatus including a longitudinal transformer |
— |
1999-05-18 |
| 5874788 |
External backup power supply |
— |
1999-02-23 |
| 5770984 |
Filter formed with a one piece U-shape ferrite core |
Michael Raleigh |
1998-06-23 |
| 5671110 |
Ground skew protection method and apparatus |
Laurence H. Fish |
1997-09-23 |
| 4940947 |
Line noise signal measurement system using analog signal compression with digital linearity correction |
Andrew McCartney |
1990-07-10 |
| 4941063 |
Telephone lines overvoltage protection apparatus |
Melvin A. Lace |
1990-07-10 |
| 4758920 |
Telephone and data overvoltage protection apparatus |
— |
1988-07-19 |
| 4725739 |
AC branch power distribution filter |
Robert T. Thomas |
1988-02-16 |
| 4623834 |
Dual programmable response time constants for electronic tap switching line regulators |
August G. Klingbiel |
1986-11-18 |
| 4455586 |
High voltage filtering and protection circuit |
— |
1984-06-19 |
| 4352055 |
AC Variable voltage source utilizing pulse width modulation |
— |
1982-09-28 |