Question: When did the founder of Bang & Olufsen die?

Context paragraphs:
Jacob Jensen: Jacob Jensen (29 April 1926 – 15 May 2015) was a Danish industrial designer best known for his work with Bang & Olufsen.  Jensen designed numerous popular high-end consumer products, developing a functional minimalism style that formed a prominent part of the Danish modern movement.  In 1958 he founded the "Jacob Jensen Design Studio."  Jensen designed for other brands including Alcatel, Kirk, Boform, General Electric, International Gift Corporation, JO-JO, Labofa, Rodenstock, Rosti (Rosti Mepal), and Stentofon.  His works have been featured at the Museum of Modern Art (MoMA) in New York City, and have received numerous design awards.

The Duets (Mulgrew Miller album): The Duets is a studio album by American jazz pianist Mulgrew Miller and Danish bassist Niels-Henning Ørsted Pedersen.  The album was recorded in Copenhagen on Bang & Olufsen label and released in 1999.  The record features famous compositions by pianist Duke Ellington as well as two originals by bandmembers.  Their duo later became a trio with the occasional inclusion of drummer Alvin Queen in 2000.

Beocenter 9500: The BeoCenter 9500 is an integrated home music system by Bang & Olufsen.  It consists of an AM/FM receiver, CD player and cassette recorder.  Its award winning design features a mirrored exterior of polished aluminium and smoked glass.  The BeoCenter 9500 has no buttons: it is controlled by touching the glass with one’s fingertip.

David Lewis (designer): David Whitfield Lewis (19 February 1939 – 8 November 2011) was an industrial designer.  He is best known for his work for Bang & Olufsen.  He was a distinguished member of Royal Designers for Industry.  Several of the products he designed are included in the MoMA permanent collection of design.

Jørgen Olufsen's House: Jørgen Olufsen's House (Danish: "Jørgen Olufsen's Gård" ) is located in Aalborg, Denmark.  Built in 1616 on the Østerå, a wide-mouth stream which became the city's harbour.  Its current address is Østerågade 25.  The three-storey house is Denmark's best preserved merchant's mansion in the Renaissance style.  Built mainly of sandstone, it also has a half-timbered section.  Olufsen, the older half-brother of Jens Bang who built the equally notable Jens Bang's House, was a successful merchant as well as Aalborg's mayor.  The residence features an integrated warehouse.

Jørgen Olufsen: Jørgen Olufsen was a Danish politician.  Olufsen built Jørgen Olufsen's House, Denmark's best preserved merchant's mansion in the Renaissance style.  The son of the Horsens merchant, Hans Felthuus, and his wife, Sidsel Jørgensdatter, he was named after his grandfather, Jørgen Olufsen, who was mayor of Horsens.  He moved to Aalborg where he married Maren Pops, the daughter of Mayor Povl Pops.  Olufsen younger half-brother, the merchant Jens Bang, built his own mansion, Jens Bang's House.

Jens Bang: Jens Bang (c. 1575 - 20 February 1644) was a wealthy Danish merchant.  Born in Horsens, he was the son of merchant Oluf Bang.  His older half-brother was the mayor, Jørgen Olufsen.  Bang arrived in Aalborg at the age of 22 where he was apprenticed to a merchant.  He purchased a large plot of land in 1621 on the corner of Algade and Østerå where, in 1623-24, his built a large stone house, which came to be known as Jens Bang's House.  He may have been trying to out-do his older brother, Olufsen, who had built a large stone house in 1616 at 25 Østerå, which came to be known as Jørgen Olufsen's House.  He married Mette, daughter of Knud Jensen, the eel-salter.  Bang died in Aalborg in 1644.

BeoSound 2: The BeoSound 2 is a digital audio player supplied by Bang & Olufsen.  It plays MP3- and WMA-format audio stored on Secure Digital or MMC media.  The device is finished in polished stainless steel.

Bang &amp; Olufsen: Bang & Olufsen (B&O) (stylized as BANG & OLUFSEN) is a high-end Danish consumer electronics company that designs and manufactures audio products, television sets, and telephones.  It was founded in 1925 by and Svend Olufsen, who designed a radio to work with alternating current, a product of significance at a time when most radios were still running on batteries.  In 2004, the company opened a factory in the Czech Republic where it employed approximately 250 staff producing mainly audio products.

Svend Olufsen: Svend Olufsen was a Danish electrical engineer who co-founded Bang & Olufsen with .  Like Bang, Olufsen studied at the Technical University of Aarhus.  Olufsen and Bang both shared an enthusiasm for radio, which at the time was in its infancy.

Supporting paragraphs: David Lewis (designer) Bang &amp; Olufsen
Answer: 8 November 2011