Ion Dracea

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Patents Grantslast 30 patents

Information Patent Grant
Signal select in underground line location
- Patent number 10,833,901
- Issue date Nov 10, 2020
- Metrotech Corporation
- Stephen John Petherick
- G01 - MEASURING TESTING
Information Patent Grant
Signal generator with multiple outputs
- Patent number 10,063,220
- Issue date Aug 28, 2018
- Metrotech Corporation
- George Mainescu
- G01 - MEASURING TESTING
Information Patent Grant
Signal select in underground line location
- Patent number 9,473,203
- Issue date Oct 18, 2016
- Metrotech Corporation
- Stephen John Petherick
- H04 - ELECTRIC COMMUNICATION TECHNIQUE

Patents Applicationslast 30 patents

Information Patent Application
SIGNAL SELECT IN UNDERGROUND LINE LOCATION
- Publication number 20170099168
- Publication date Apr 6, 2017
- Metrotech Corporation
- STEPHEN JOHN PETHERICK
- G01 - MEASURING TESTING
Information Patent Application
SIGNAL GENERATOR WITH MULTIPLE OUTPUTS
- Publication number 20160218702
- Publication date Jul 28, 2016
- Metrotech Corporation
- George MAINESCU
- G01 - MEASURING TESTING
Information Patent Application
SIGNAL SELECT IN UNDERGROUND LINE LOCATION
- Publication number 20130287125
- Publication date Oct 31, 2013
- Vivax-Metrotech
- Stephen John Petherick
- G01 - MEASURING TESTING