Quarterly revenue at the Farmingdale-based defense contractor Telephonics increased 20 percent due to its key role in the U.S. military’s battle against insurgent roadside bombs in Iraq and Afghanistan, Thursday’s earnings report shows.

Telephonics is a supplier to the military’s Counter Radio-Controlled IED Electronic Warfare system, which jams the radio frequency of the garage door openers and cell phones that are typically used to detonate the bombs.

Telephonics revenues are reported in the quarterly filings of its parent Griffon Corp.

Telephonics revenues were $116.2 million, up from $96.6 million in the same quarter last year. Telephonics operating income increased $2.4 million, or 29 percent, to $10.6 million from the prior year quarter.


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