WASHINGTON (AP) — A Raytheon Co. employee from California who found a new way to get real-time readings from large laser radars now holds the nation's 10 millionth patent.

The White House says President Donald Trump signed the patent Tuesday for Joseph Marron of Manhattan Beach.

Large laser radars use reflected light to measure speed and distance. Marron is an optical engineer who says in a statement issued by Raytheon that the achievement is equivalent to someone who buys a lottery ticket every month. Marron says "eventually, it hits."

Raytheon says Marron holds more than 20 patents, starting...