Penn begins manufacturing tennis balls in Jeanette, Pennsylvania.

Penn makes the first pressurized ball cans.

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

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. Penn develops Optic Orange tennis felt. Penn develops the first ball for high altitude areas.

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

Penn goes green. Recycled tennis ball cans appear on Penn shelves.

Penn develops a stain and moisture resistant felt.

Penn designs the first Titanium tennis ball and pressureless tennis ball for training.

Penn Racquet Sports is acquired by HEAD.

Responding to ITF requests, Penn introduces the first larger ball of the century, the Penn OS.

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

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

Penn enhances Penn ATP ball with SMART OPTIK felt for increased visibility.

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 enhances Pro Penn ball to Pro Penn+ with new LongPlay Felt which keeps the ball looking cleaner longer.

Penn Turns 100 Years Old and continues to be America's 1 Selling Ball.