Question: What is the name of the American inventor who was a notable visitor of the Grand Hotel in Michigan?

Context paragraphs:
Thomas Edison: Thomas Alva Edison (February 11, 1847October 18, 1931) was an American inventor and businessman, who has been described as America's greatest inventor.  He developed many devices that greatly influenced life around the world, including the phonograph, the motion picture camera, and the long-lasting, practical electric light bulb.  Dubbed "The Wizard of Menlo Park", he was one of the first inventors to apply the principles of mass production and large-scale teamwork to the process of invention, and because of that, he is often credited with the creation of the first industrial research laboratory.

Isotta Brothers: The Isotta Brothers were notable Italian hoteliers in the second half of the nineteenth century.  Amongst their hotels, they owned the Hotel de Geneve in Geneva, the Hotel Central and Hotel Quissana in Naples, and the Hotel de Paris, Grand Hotel Isotta, Grand Hotel d'Italie and Croix de Malte in Genoa.

Grand Hôtel (Stockholm): Grand Hôtel is a five-star hotel in Stockholm.  It was founded by Frenchman, Jean-François Régis Cadier, in 1872.  It opened on 14 June 1874 at the same time as the Grand Hotel in Oslo; all the Scandinavian capitals have a major hotel called 'Grand Hotel'.  The Grand Hôtel is located next to the Nationalmuseum and opposite the Royal Palace and "Gamla stan" (the old town).  Since 1901, the Nobel Prize laureates and their families have traditionally been guests at the hotel, as well as several celebrities and world leaders.

Kaohsiung Grand Hotel: The Kaohsiung Grand Hotel () is a hotel located in Niaosong District, Kaohsiung, Taiwan.  The hotel is located next to the Chengching Lake.  The Grand Hotel is a sister hotel of the main Grand Hotel in Taipei City, the Taipei Grand Hotel.

Grand Auditorium and Hotel Block: The Grand Auditorium and Hotel Block is a group of four adjoining historic commercial buildings located in Story City, Iowa, United States.  From the east, buildings one and three housed various commercial establishments over the years.  Building two housed the Grand Opera House, now known as the Story Theatre/Grand Opera House.  It has been used for both live theater productions and movies.  The fourth building housed the Grand Hotel.  The Grand Hotel and Auditorium Company was organized from Story City's Commercial Club in 1913.  They hired Estherville, Iowa architect James S. Cox to design the complex, which was completed in December 1913.  While each facade is unique, all four buildings share common elements.  Their commonalities include two-stories in height, red brick exterior walls ornamented with buff brick and concrete details.  The first three buildings share the same wall plane, while the hotel is slightly recessed from the others.  They also decrease in scale from east to west.  This slight variation is due to differing treatments of the cornices and parapets.  The buildings were listed on the National Register of Historic Places in 1980.

Kearsarge House: The Kearsarge House was a grand hotel in North Conway, New Hampshire, United States, from 1872 until it was destroyed by fire on October 18, 1917.  Its legacy is continued by the nearby Kearsarge Inn which has a clock from the original hotel.  Samuel W. Thompson carried mail to the town and other areas including a route he started to Glen House, another grand hotel in the area, until a rail line was established in the area in 1871.  As visitor numbers increased, the hotel was scaled up by Thompson who also acted as a promoter for the area.

Grand Hotel (Mackinac Island): The Grand Hotel is a historic hotel and coastal resort on Mackinac Island, Michigan, a small island located at the eastern end of the Straits of Mackinac within Lake Huron between the state's Upper and Lower peninsulas.  Constructed in the late 19th century, the facility advertises itself as having the world's largest porch.  The Grand Hotel is well known for a number of notable visitors, including five U.S. presidents, Russian presidents Vladimir Putin and Dmitri Medvedev, inventor Thomas Edison, and author Mark Twain.

Grand Hotel (novel): Grand Hotel (original German "Menschen im Hotel," "People at a Hotel") is a 1929 novel by Vicki Baum, which was the basis for the film "Grand Hotel".  It should not be confused with "Berlin Hotel" (original German "Hotel Berlin"), published in 1945, which deals with the situation in Germany towards the end of World War II.  The film "Grand Hotel" was remade as "Week-End at the Waldorf" (1945).

Grand Hotel (Auckland): The Grand Hotel, at 9 Princes Street, was the leading hotel of Auckland, New Zealand, from 1889 until 1966.  With its vaulted ceilings, ornate mantlepieces, red carpet and marble statuary, the Grand Hotel was a plush and social rendezvous from its opening.  The Grand Hotel reopened in 1967/8 as the 'Grand Building' fitted out as offices.

Roxy Hotel (New York City): The Roxy Hotel, formerly the Tribeca Grand Hotel, is a hotel located at 2 Avenue of the Americas between Walker and White Streets in the Tribeca neighborhood of Lower Manhattan, New York City.  It is the sister hotel of the Soho Grand Hotel which is located a few blocks away.  Both hotels are owned and operated under Grand Life Hotels.  Tribeca Grand opened in 2000 and has 201 guest rooms.  The hotel's event venues are often used for movie premiers, screenings, and social events.  In September 2015 the hotel re-branded and changed its name to The Roxy Hotel.

Supporting paragraphs: Grand Hotel (Mackinac Island) Thomas Edison
Answer: Thomas Edison