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(46)	Int. C	2015.01	4,386,560 A	12/1936	Bergnaum et al.
	E70K 15/04	2015.01	4,473,459 A	1/1937	Larson
	E70K 7/18		4,576,720 A	2/1937	Thiel

(47) References Cited

U.S. PATENT DOCUMENTS

1,000,351 A	3/1932	Turcotte et al.
1,015,317 A	4/1932	Roob
1,113,740 A	4/1932	Feeney et al.
1,158,526 A	4/1932	Dare et al.
1,196,774 A	6/1932	Littel
1,204,391 A	7/1932	Berge
1,236,832 A	9/1932	Roberts-Kunze
1,305,063 A	9/1932	Graham et al.
1,327,538 A	11/1932	Rutherford
1,344,122 A	11/1932	Nienow
1,417,421 A	12/1932	Franecki et al.
1,486,042 A	1/1933	Shanahan
1,494,916 A	3/1933	Ortiz et al.
1,532,988 A	4/1933	Kihn
1,576,947 A	6/1933	Reichert et al.
1,677,896 A	6/1933	Witting
1,750,421 A	8/1933	Ruecker et al.
1,887,986 A	10/1933	Beatty et al.
1,933,293 A	12/1933	Schamberger et al.
1,960,601 A	2/1934	Wunsch
1,984,150 A	3/1934	Ankunding-Roob et al.
2,072,399 A	3/1934	Collier
2,159,515 A	3/1934	Schneider et al.
2,178,884 A	4/1934	Krajcik et al.
2,285,971 A	5/1934	Keeling et al.
2,375,008 A	7/1934	Kilback-Carroll et al.
2,476,473 A	8/1934	Morar
2,564,008 A	8/1934	Wisoky et al.
2,702,030 A	10/1934	Streich et al.
2,744,879 A	11/1934	Abshire
2,860,415 A	1/1935	Dickinson
2,912,072 A	3/1935	Halvorson
2,965,140 A	3/1935	MacGyver et al.
3,068,841 A	3/1935	Dach et al.
3,146,028 A	5/1935	Koelpin et al.
3,179,207 A	5/1935	Goyette et al.
3,263,844 A	7/1935	Kreiger-Hoeger et al.
3,320,746 A	8/1935	Schultz et al.
3,374,395 A	8/1935	Nitzsche et al.
3,456,533 A	9/1935	Schultz et al.
3,491,932 A	9/1935	Cartwright et al.
3,601,990 A	10/1935	Zemlak
3,715,233 A	12/1935	Dibbert et al.
3,758,160 A	12/1935	McDermott et al.
3,776,506 A	2/1936	Yost et al.
3,894,472 A	4/1936	Brakus
3,922,794 A	6/1936	Cummerata
4,072,404 A	6/1936	Purdy et al.
4,140,725 A	6/1936	Feeney et al.
4,246,752 A	6/1936	Skiles
4,277,686 A	6/1936	White
4,297,813 A	8/1936	Cummerata et al.
4,354,695 A	10/1936	Glover et al.