Swoosh! Penn makes the first pressurized ball cans.

Penn invents a more durable felt cover by weaving New Zealand wool and man-made fibers.

It's a bright idea. Penn makes the first fluorescent yellow tennis ball.

Penn's "play-rated" balls debut - unique tennis balls for different court surfaces and high-altitude areas.

Penn turns to a safer, plastic pull-ring can. And the first orange tennis ball bounces onto the Penn court.

Pro Penn becomes the official ball of the USPTA, and is sold exclusively by USPTA-certified professionals.

Penn incorporates Titanium into tennis balls with the introduction of Championship Titanium tennis balls.

Penn becomes Official Ball of the Tennis Masters Series and introduces the Penn Tennis Masters Series ball with new SMART OPTIKTM felt.

Penn introduces the Penn Championship Pink Ball to benefit breast cancer research.

Penn Celebrates its 30th Anniversary manufacturing tennis balls at the Phoenix, AZ facility.

Penn introduces new Encore technology in its Pro Penn tennis balls. Encore technology limits ball softening for increased durability and helps balls "play like new" longer.

Penn introduces the Pro Penn Tennis Instructional Program (T.I.P.) - a series of transitional tennis balls to make learning tennis easier and more fun.

Penn introduces new Pro Penn+ with LongPlay felt for 25% longer wear and 19% greater visibility. In addition, Pro Penn+ still features Encore Technology for a 33% longer lasting core. This is Penn’s most technologically advanced and longest lasting tennis ball yet!