The Volvo Group (Swedish: Volvokoncernen; legally Aktiebolaget Volvo, shortened to AB Volvo) (stylised as VOLVO) is a Swedish multinational manufacturing company headquartered in Gothenburg. While its core activity is the production, distribution and sale of trucks, buses and construction equipment, Volvo also supplies marine and industrial drive systems and financial services. Although the two firms are still often conflated, Volvo Cars, also based in Gothenburg, has been a totally separate company since it was sold to the Ford Motor Company in 1999. The companies still share the Volvo logo and co-operate in running the Volvo Museum. Volvo was established in 1915 as a subsidiary of SKF, the ball bearing manufacturer; however the Volvo Group and Volvo Cars consider themselves to have been officially founded on 14 April 1927, when the first car, the Volvo ÖV 4 series, affectionately known as "Jakob", rolled out of the factory in Hisingen, Gothenburg. The building remains (57°42'50?N 11°55'19?E? / ?57.71389°N 11.92194°E? / 57.71389; 11.92194). Volvo means "I roll" in Latin, conjugated from "volvere", in reference to ball bearings. The brand name Volvo was originally registered as a trademark in May 1911 with the intention to be used for a new series of SKF ball bearings. This idea was only used for a short period and SKF decided to simply use "SKF" as the trademark for all its bearing products.