Question: Paccar is engaged in the design of trucks under which Denton, Texas company's nameplate?

Context paragraphs:
Plant expressed vaccine: In 2000, a patent entitled "Vaccines expressed in plants" U.S. Patent  was issued.  In 2005 DARPA’s Accelerated Manufacture of Pharmaceuticals (AMP) program was created In response to emerging and novel biologic threats.  In 2009 DARPA offered a government contract for a Non-GMO plant-based systems expressing recombinant proteins, due to The 2009 H1N1 swine flu pandemic that highlighted the national need for rapid and agile vaccine manufacturing capabilities.  The Texas A&M University and a Texas company have been awarded a $40 million U.S. Department of Defense grant to develop a plant expressed vaccine made from tobacco, egg-based vaccines typically take at least six months to develop once a virus is isolated, the new process will take four to six weeks., "If this works, we'll have a billion-dose-per-month vaccine facility in Texas, which would be by far the largest and most capable center in the world."

Lewisville Lake Toll Bridge: The Lewisville Lake Toll Bridge (LLTB) is a bridge crossing Lewisville Lake in Denton County, Texas, USA.  The North Texas Tollway Authority (NTTA) worked cooperatively with Denton County to plan and design a toll bridge across the northwestern arm of Lewisville Lake.  The new four-lane toll bridge connects Swisher Road in Lake Dallas to Eldorado Parkway in Little Elm, Texas.  The Lewisville Lake Corridor is approximately 13.8 miles long and is divided into eight sections constructed by Denton County, NTTA, TxDOT, Little Elm, and Frisco, Texas.

Hayes Manufacturing Company: The Hayes Manufacturing Company Limited was a Vancouver-based Canadian manufacturer of heavy trucks known for their durability and a revolving bunk system.  Founded in 1920, Hayes built both highway and off-road trucks, particularly for the logging industry.  On a smaller scale, Hayes also manufactured buses.  The Signal Company acquired a controlling stake in the company in 1969, and in 1971 renamed it Hayes Trucks.  In 1975, Signal sold the company to Paccar, which closed the Hayes plants.

Paccar: PACCAR Inc is an American Fortune 500 company and counts among the largest manufacturers of medium- and heavy-duty commercial vehicles in the world.  PACCAR is engaged in the design, manufacture and customer support of light-, medium- and heavy-duty trucks under the Kenworth, Peterbilt and DAF nameplates.  PACCAR also designs and manufactures diesel engines, provides financial services and information technology, and distributes truck parts related to its principal business.

Daihatsu Delta: The Daihatsu Delta is an automotive nameplate that has been used on a variety of Japanese Daihatsu trucks and vans between 1970 and 2010.  They have usually been Toyota-based, or otherwise based on models from the Toyota-owned Hino Motors.  The trucks have utilized a cab over engine or mid-engine design.  Typically fitted with Toyota engines, a few versions, particularly diesels, received Daihatsu's own engines.  The Delta badge was retired in Japan in 2003, but continued to be used on models built locally in other markets until 2010.

Texaco: Texaco, Inc. (""The Texas Company"") is an American oil subsidiary of Chevron Corporation.  Its flagship product is its fuel "Texaco with Techron".  It also owns the Havoline motor oil brand.  Texaco was an independent company until its refining operations merged into Chevron Corporation in 2001, at which time most of its station franchises were divested to the Shell Oil Company.  It began as the Texas Fuel Company, founded in 1901 in Beaumont, Texas, by Joseph S. Cullinan, Thomas J. Donoghue, Walter Benona Sharp, and Arnold Schlaet upon the discovery of oil at Spindletop.

Indian Refining Company: The Indian Refining Company was an American oil company in operation from the first decade of the 1900s to April 2, 1943.  It was bought by the Texas Company in 1931.  It had an oil refinery based in Lawrenceville, Illinois.  Indian Refining patented the first "wax free" oil under the Havoline brand.  The chemists at the Lawrenceville, Illinois refinery developed the wax free motor oil which led to an Indian Refining patent.  The Texas Company (TEXACO) acquired Indian Refining in 1931 primarily to access the formulation for wax free motor oil, which was developed and is currently the standard for all conventional motor oils throughout the world.

Peterbilt: Peterbilt Motors Company, founded in 1939 Denton,Texas is an American manufacturer of medium- and heavy-duty Class 5 through to Class 8 trucks.  A subsidiary of Paccar, which also owns its longtime competitor Kenworth, it operates manufacturing facilities and has its headquarters in Denton, Texas.  It also has a factory in Sainte-Thérèse, Quebec.

DAF Trucks: DAF Trucks NV is a Dutch truck manufacturing company and a division of Paccar.  Its headquarters and main plant are in Eindhoven.  Cabs and axle assemblies are produced at its Westerlo plant in Belgium.  Some of the truck models sold with the DAF brand are designed and built by Leyland Trucks at their Farington plant in Leyland near Preston, England.

Thomas Peter Lee: Thomas Peter Lee was born on March 19, 1871, in Petroleum, West Virginia to Alexander and Martha Jane Mount Lee, Thomas Peter Lee left school at the age of sixteen and went to work in the oil fields, first in his native state and then in Ohio.  In 1903 he moved to Saratoga, Texas, where he gained employment with the newly formed Texas Company, which eventually became Texaco, and when he left that organization ten years later, he had attained the rank of general superintendent of production.  While there, however, he became friends with J.S. Cullinan, and the two, along with Emerson Francis Woodward, Will C. Hogg, and James L. Autry, joined in 1914 to form the Farmers Petroleum Company, of which Lee became president.

Supporting paragraphs: Paccar Peterbilt
Answer: Peterbilt Motors Company