Who designed the Raleigh Chopper children's bicycle?

Thomas Josef Derrick Paul Karen (20 March 1926 – 31 December 2022) was a British industrial designer. He was managing director and chief designer of Ogle Design from 1962 until 1999. Karen oversaw design of the Bush Radio TR130 radio, the Raleigh Chopper, the Bond Bug, the Reliant Scimitar GTE, the Anadol A1 (FW5), a series of lorry cabs for Leyland, and the Marble Run toy (sold by Kiddicraft).

The Raleigh Chopper is a children's bicycle, a wheelie bike, manufactured and marketed in the 1970s by the Raleigh Bicycle Company of Nottingham, England. Its unique design became a cultural icon and is fondly remembered by many who grew up in that period. The design was influenced by dragsters, "chopped" motorcycles, beach buggys, and even chariots.

The Chopper's patent was applied for in the US in 1967. The Chopper was introduced at American trade shows in January 1969 but it was not until April 1969 when Raleigh Choppers were available for public to purchase. The bike featured a choice of a single-speed coaster hub, or a 3-speed or 5-speed Sturmey Archer gear hub, selected using a frame-mounted console gear lever. Other features that appealed to the youth market were the unusual frame, long padded high-back seat, sprung seat at the back, high-rise (ape hanger) handlebars, 'bobbed' mudguards (fenders) and differently sized wheels: 16 in (41 cm) front and 20 in (51 cm) rear.