Question: Learjet was founded by which inventor and businessman?

full_context: Document 1: Avro Canada: Avro Canada was a Canadian aircraft manufacturing company. It started in 1945 as an aircraft plant and within thirteen years became the third-largest company in Canada, one of the largest 100 companies in the world, and directly employing over 50,000. Avro Canada was best known for the highly advanced CF-105 Arrow, but through growth and acquisition, it rapidly become a major, integrated company that had diverse holdings.
Document 2: E. M. Laird Airplane Company: Emil Matthew Laird partnered with the founders of the Wichita Airplane Company to build a new commercial biplane aircraft in 1920. The E.M Laird Company built 45 Swallow aircraft of this design. E.M Laird sold all rights on 27 September 1923 to J. M Mollendick, and formed a new company, the E. M. Laird Airplane Company based out of Chicago. The original E. M. Laird Company then became the Swallow Airplane Company, retaining brother Charles Laird. Charles Laird cocurrently started a short lived aircraft company named Laird Aircraft Corporation, publicly known as Whipporwhill in order to differentiate himself from Emil.
Document 3: Bombardier Inc.: Bombardier Inc. (] ) is a multinational aerospace and transportation company based in Montreal, Quebec, Canada. Starting as a maker of snow machines or snowmobiles, over the years it has grown into a large manufacturer of regional airliners, business jets, mass transportation equipment, and recreational equipment, and a provider of financial services.
Document 4: Peter L. Jensen: Peter Laurits Jensen (16 May 1886 – 26 October 1961) was a Danish American engineer, inventor and entrepreneur. He founded Magnavox Company and Jensen Radio Manufacturing Company.
Document 5: Charles F. Kettering: Charles Franklin Kettering (August 29, 1876 – November 25, 1958) sometimes known as Charles "Boss" Kettering was an American inventor, engineer, businessman, and the holder of 186 patents. He was a founder of Delco, and was head of research at General Motors from 1920 to 1947. Among his most widely used automotive developments were the electrical starting motor and leaded gasoline. In association with the DuPont Chemical Company, he was also responsible for the invention of Freon refrigerant for refrigeration and air conditioning systems. At DuPont he also was responsible for the development of Duco lacquers and enamels, the first practical colored paints for mass-produced automobiles. While working with the Dayton-Wright Company he developed the "Bug" aerial torpedo, considered the world's first aerial missile. He led the advancement of practical, lightweight two-stroke diesel engines, revolutionizing the locomotive and heavy equipment industries. In 1927, he founded the Kettering Foundation, a non-partisan research foundation. He was featured on the cover of Time Magazine on January 9, 1933.
Document 6: Bill Lear: William Powell "Bill" Lear (June 26, 1902 – May 14, 1978) was an American inventor and businessman. He is best known for founding the Lear Jet Corporation, a manufacturer of business jets. He also invented the battery eliminator for the B battery, and developed the 8-track cartridge, an audio tape system. Throughout his career of 46 years, Lear received over 120 patents.
Document 7: Learjet: Learjet is a Canadian owned, American manufacturer of business jets for civilian and military use based in Wichita, Kansas. Founded in the late 1950s by William Powell Lear as Swiss American Aviation Corporation, it has been a subsidiary of Canadian Bombardier Aerospace since 1990, which markets it as the "Bombardier Learjet Family".
Document 8: William J. Powell: William Jenifer Powell (July 27, 1897 – July 12, 1942) was an American engineer, soldier, civil aviator and author who is credited with promoting aviation among the African American community. Along with Bessie Coleman and James Banning, he is recognized as a pioneer aviator and a civil rights activist. Powell was optimistic about the prospects of African-Americans in aviation, and believed that their involvement in the industry would help end racial prejudice at a time of widespread segregation under the Jim Crow laws.
Document 9: Air 500: Air 500 Limited was a Canadian airline. Founded in 1985 by Dennis Chadala, former Captain, director of marketing and assistant to Carl Millard, of the defunct Millardair. The company commenced operations with 1 Super Beech 18 Model E, registered C-FTAE that was purchased from Bradley First Air where it had retired from flying the dew line in Northern Canada. The Beech18 was originally purchased new by Timmins Aviation. The founder had extensive knowledge of the emergency freight business and the operation of DC3s, Super DCs and DC4 aircraft due to his position within the inner circle at Millardair. Dennis Chadala created Air 500 Limited on a shoe string, without financing and was the first airline to receive licensing and an operating certificate at Toronto's Pearson International Airport following deregulation of the aviation industry in Canada in 1985. The airline grew rapidly adding an aircraft at the pace of 1 every six months. By 1989 it had acquired almost all of the business flying ad hock charter out of Toronto for Chrysler, Ford, GM and many others formerly serviced by his former place of employment at Millardair. The young owner's extensive knowledge of this niche area of aviation enabled him to expand rapidly and capture that market segment. At the time, Air 500 was an exceptional success story operating 3 Super Beech 18 aircraft, 2 Cessna 310s, 1 DC3, 1 Super DC(C117), 1 Piper Cheyenne and 1 Mitsubishi MU2 Marquise. In the early nineties, the fleet continued to grow adding 2 more Mitsubishi MU2 aircraft, 2 Citation 500 business jets and 1 Citation 2 business jet. In 1995 the airport was privatized and came under the direction and control of the GTAA (Greater Toronto Airport Authority) and Dennis Chadala simultaneously acquired Hangar #7, the newest hangar facility at the north end of the Pearson Airport off Derry Road with 40 years remaining on the current land lease. Air 500 had contracts in the courier industry, Air Ambulance Services and Aircraft Management as well as a base of operations at the Esso Avitat in Ottawa where 2 Mitsubishi Marquise MU2 aircraft were stationed. One was flying an exclusive long term contract for Nordion (formerly Atomic Energy of Canada) flying radio active isotopes to numerous destinations in the United States for medical purposes as a well a designated charter aircraft. Hangar #7 was large enough to lease out one half the facility to Air 500 Limited and the other half to Execaire/Innotech Aviation and they remained tenants of the hangar owned by Dennis Chadala until November 1998, at which time Execaire/Innotech owned by the IMP Group out of Halifax Nova Scotia struct a deal with Dennis Chadala to purchase his hangar facility, all his aircraft and the operating airline Air 500 Limited. Dennis Chadala stayed on with the company during a short transition period that ended in February 1999. Air 500 was amalgamated into Execaire and became part of that operating group taking advantage of the synergies available to them.
Document 10: Lee de Forest: Lee de Forest (August 26, 1873 – June 30, 1961) was an American inventor, self-described "Father of Radio", and a pioneer in the development of sound-on-film recording used for motion pictures. He had over 180 patents, but also a tumultuous career—he boasted that he made, then lost, four fortunes. He was also involved in several major patent lawsuits, spent a substantial part of his income on legal bills, and was even tried (and acquitted) for mail fraud. His most famous invention, in 1906, was the three-element "Audion" (triode) vacuum tube, the first practical amplification device. Although De Forest had only a limited understanding of how it worked, it was the foundation of the field of electronics, making possible radio broadcasting, long distance telephone lines, and talking motion pictures, among countless other applications.
Document 11: Ray Dolby: Ray Milton Dolby {'1': ", '2': ", '3': ", '4': "} ( ; January 18, 1933 – September 12, 2013) was an American engineer and inventor of the noise reduction system known as Dolby NR. He helped develop the video tape recorder while at Ampex and was the founder of Dolby Laboratories.
Document 12: PowerJet: PowerJet is a Franco-Russian 50-50 joint venture created in 2004 by aeronautical engine manufacturers Snecma (Safran) and NPO Saturn. The company is in charge of the SaM146 program – the sole powerplant for the Sukhoi Superjet 100 airliner – including design, production, marketing and after-sales support. It delivers a complete propulsion system, comprising engine, nacelle and equipment.
Document 13: Bede Aircraft: Bede Aircraft Corporation was founded by controversial aeronautical engineer Jim Bede in 1961 to produce the BD-1 kit aircraft, which eventually became the American Aviation Corporation's AA-1. The company also created and produced a number of advanced kit planes including the famous Bede BD-5 (pusher propeller driven) and BD-5J (turbojet driven). The BD-5J has held the Guinness record as the World's Smallest Jet Aircraft for more than a quarter century. Versions of it saw use in various Budweiser commercials (the Bud Light Jet, which was lost in an inflight fire and crash unrelated to airshow work). The tiny jet also appeared in two James Bond movies; "Octopussy" starring Sir Roger Moore, and later in a cameo appearance, hanging from the wall of Q's workshop in "Die Another Day" starring Pierce Brosnan as Agent 007.
Document 14: Charlie Johnson (pilot): Charles (Charlie) Johnson is a former president of Cessna Aircraft. He was born in 1942 in Georgia and grew up in Memphis. He has always been passionate about technology. Because he was also passionate about flight, he joined the Air Force. He fought in the Vietnam War flying the T-33, T-37, T-38, and the F-105. After the Vietnam War he continued with his love of flying. Johnson was a personal pilot for Arnold Palmer. After this he became a test pilot for Learjet. Soon after he rose through the ranks of Cessna to President and COO of Cessna Aircraft. Johnson joined Bye Aerospace in 2014 and was inducted into the Colorado Aviation Hall of Fame the same year. He has just recently been inducted into the Kansas Aviation Hall of Fame. Johnson continues to fly and has a love of cars.
Document 15: VistaJet: VistaJet is a global business aviation company founded in 2004 by Thomas Flohr. The firm flies government, corporate and private clients between any two points, under a "pay for hours flown" fare structure.
ground_truth: William Powell "Bill" Lear