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Patent applications and USPTO patent grants for Oblad; David L..The latest application filed is for "interactive intercom system for building entry control".
Patent | Date |
---|---|
Interactive Intercom System For Building Entry Control App 20110150195 - Oblad; David L. | 2011-06-23 |
Telephone Intercom Remote Line Interface Modules For Installations With Non-localized Points Of Demarcation App 20070291916 - Oblad; David L. | 2007-12-20 |
System For The Application And Removal Of Intercom Telephone Power Upon Activation Or Deactivation Of Telephone Company Service App 20070041544 - Oblad; David L. | 2007-02-22 |
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