I found Charles on both the 1910 and 1920 census.There is also info on this family in these resources:
Cleveland Necrology Files: www.cpl.org
Ohio Historical Society Death Index: www.ohiohistory.org
Cuy Co Historical Marriage Index: http://220.127.116.11/ml/http://18.104.22.168/ml/
1910 Census Ohio Cuyahoga Cleveland ED 252 Visit 106
3623 E. 54 St.
Sochor, Charles, Head, age 41, Widowed, b. Austria-Bohemia
arrived US 1891, naturalized, speaks Bohemian
occupation:laborer in box factory
Sochor, Charles, son, age 15, b. OH, can wiper, Standard Oil Co.
Sochor, James, son, age 14, b. OH, plater, sewing machine Co.
Sochor, Stella, dtr, age 12, b. OH
Sochor, Rose, dtr, age 10, b. OH
Sochor, Emil, son, age 8, b. OH
Sochor, Mary, dtr, age 6, b. OH
1920 Census Ohio Cuyahoga Cleveland, ED 284
3810 E. 57
Skowronski, Joe, Head, age 24, M b. OH, Pol(Ger), Pol(Ger)
occ: riveter, Hydraulic
Skowronski, Rose, wife, age 20, M b. OH, Bohemia, Bohemia
Skowronski, Edward, son, age 2-3/12, b. OH, OH, OH
Sochor, Charles, father-in-law, age 53, Wd, b. Bohemia, Bohemia, Bohemia, arrived US 1897, Na 1903; occ: laborer, stove Co.
Sochor, Emil, brother-in-law, age 18, S b. OH, Bohemia, Bohemia, occ: clerk, forge co.
Sochor, Mary, sister-in-law, age 15, b. OH, Bohemia, Bohemia, occ: clerk, grocery
Hope this helps,