Question: The father of George J. Gruen emigrated to the United States during what decade?

Context articles: Pay Day (board game)
George J. Terwilliger III
George J. Willmann
United States Phonograph Company
Hagerty House
Dufek Coast
Dietrich Gruen
United States Senate election in Maine, 1994
George Hyde (gun designer)
George J. Gruen

Pay Day is a board game originally made by Parker Brothers (now a subsidiary of Hasbro) in 1975.
 It was invented by Paul J. Gruen of West Newbury, Massachusetts, United States, one of the era's top board game designers.
 It was Gruen's most successful game, outselling "Monopoly" in its first production year.
 Pay Day is currently marketed by Winning Moves.
George J. Terwilliger III (born June 5, 1950) is an American lawyer and politician.
 He is a partner in the Washington, D.C. office of McGuireWoods LLP and is a former United States Deputy Attorney General and acting United States Attorney General.
 Terwilliger, of Vermont, was nominated on February 14, 1992, by President George H.W. Bush to be Deputy Attorney General at the U.S. Department of Justice.
 He would succeed William Pelham Barr.
 As Deputy Attorney General, Terwilliger became the second-highest-ranking official in the United States Department of Justice (DOJ) and ran the day-to-day operations of the Department, serving in that position from 1991 through 1993.
 He was appointed to the position after serving as the United States Attorney for the District of Vermont.
 In addition, he currently serves on the Advisory Board of Intellaine, LLP, a U.S. defense and risk engineering firm located in Arlington, Virginia.
Fr.
 George J. Willman, SJ (June 29, 1897 - September 14, 1977) was a Jesuit priest regarded as the "Father of the Knights of Columbus in the Philippines".
 Born in the United States he was granted Filipino citizenship due to his missionary work in the Philippines.
The United States Phonograph Company was a manufacturer of cylinder phonograph records and supplies in the 1890s.
 It was formed in the Spring of 1893 by Victor Emerson, manager of the New Jersey Phonograph Company.
 Simon S. Ott and George E. Tewkesbury, heads of the Kansas Phonograph Company and inventors of an automatic phonograph joined later.
 It was based in Newark, New Jersey.
 After the collapse of the North American Phonograph Company in August 1894, the United States Phonograph Company became one of the industry's largest suppliers of records, competing mostly with the Columbia Phonograph Company who had joined with the American Graphophone Company to manufacture graphophones (at this point nearly identical to phonographs), blank wax cylinders, and original and duplicate records.
 The USPC manufactured duplicates as well, which allowed their recording program to reach the scale of competing with Columbia's.
 Their central location and proximity to New York allowed them to record the most popular artists of the 1890s, including George J. Gaskin, Dan W. Quinn, Len Spencer, Russell Hunting and Issler's Orchestra.
 Emerson left the company to lead Columbia's recording department around the summer of 1896.
 In 1897 the USPC worked with Edison's National Phonograph Company to retrofit phonographs with spring motors invented by Frank Capps.
 The convenience and cost savings of spring-motor phonographs like these helped shift the phonograph from a public entertainment (in parlors or exhibitions) to a consumer good.
 In October 1899 the company was prohibited by court order from manufacturing duplicate records, and they began supplying original records for the National Phonograph Company[7][6]<nowiki>[5]</nowiki>.
 The later U.S. Phonograph Company of Cleveland Ohio is unrelated.
The Hagerty House, also called the Hagerty-Harris House, is a two story house located on 505 East Rusk Street in Marshall, Texas.
 Built in 1889 by Thomas Higgins, it was the first solid brick residence in Marshall.
 It was built for William Phillip Hagerty, personal engineer of Texas and Pacific Railroad president George J. Gould by railway craftsmen.
 Born in 1848 in Ireland during the Great Potato Famine, Hagerty was likely to be arrested by the British government due to his nationalist activities when he emigrated in 1866 to the United States.
The Dufek Coast is that portion of the coast along the southwest margin of the Ross Ice Shelf between Airdrop Peak on the east side of the Beardmore Glacier and Morris Peak on the east side of Liv Glacier.
 It was named by the New Zealand Antarctic Place-Names Committee in 1961 after Rear Admiral George J. Dufek, United States Navy, who served under Rear Admiral Richard E. Byrd with the United States Antarctic Service, 1939–41, and as commander of the Eastern Task Force of U.S. Navy Operation Highjump, 1946–47.
 He was Commander of U.S. Naval Support Force Antarctica, 1954–59, a period in which the following American science stations were established: McMurdo Station, Little America V, Byrd Station, South Pole Station, Wilkes Station, Hallett Station and Ellsworth Station.
 United States Navy ships, aircraft, and personnel under his command provided broad logistical support to research and survey operations, including aerial photographic missions to virtually all sectors of Antarctica.
 On October 31, 1956, Dufek in the ski-equipped R4D Skytrain aircraft "Que Sera Sera" (pilot Lieutenant Commander Conrad Shinn), flew from McMurdo Sound via Beardmore Glacier to make the first airplane landing at the South Pole.
Dietrich Gruen (February 22, 1847April 10, 1911), was a German born watchmaker who emigrated to the United States in the 1860s and later founded the Gruen watch Company.
The 1994 United States Senate election in Maine was held on November 7, 1994.
 Incumbent Democratic U.S. Senator and Senate Majority Leader George J. Mitchell decided to retire, instead of seeking a third term.
 United States Congressman Tom Andrews won the Democratic primary unopposed, while United States Congresswoman Olympia Snowe won the Republican primary unopposed.
 In the general election, Snowe defeated Andrews in a rout to win her first of three terms in the United States Senate, a stark contrast to retiring Senator Mitchell's landslide win six years prior.
George J. Hyde Sr. (born Heide; January 4, 1888 – December 1963) was a German-born American machinist, gunsmith and gun designer best known for his submachine guns.
 He was born in Apfingen, Germany.
 Already a skilled machinist, he emigrated to the United States in 1927.
 His family followed the next year.
George J. Gruen (1877–1953) was an American watchmaker who managed the Gruen Watch Co. He was the second son of the founder Dietrich Gruen.