From SSDI about people with surname "Kopec" connected with Detroit 48228 (compare with Joseph's residence):
Name     Birth     Death     Last Residence     Last Benefit     SSN     Issued

ANDREW KOPEC      10 Oct 1896     Mar 1984     48228 (Detroit, Wayne, MI)     (none specified)     362-10-9437     Michigan

EVA KOPEC      31 Jul 1899     Aug 1973     48228 (Detroit, Wayne, MI)     (none specified)     367-68-3854     Michigan

JOSEPHINE KOPEC      29 Sep 1906     01 Feb 1995     48228 (Detroit, Wayne, MI)     (none specified)     378-01-4345     Michigan

JOSEPH KOPEC      06 Feb 1897     Nov 1985     48228 (Detroit, Wayne, MI)     (none specified)     378-01-9563     Michigan

In the same Wayne County:

EDWARD R KOPEC      16 Aug 1921     12 Jun 1999 (V)     48239 (Redford, Wayne, MI)     (none specified)     177-12-3379     Pennsylvania

MARY KOPEC      02 Feb 1881     Jun 1974     48101 (Allen Park, Wayne, MI)     (none specified)     365-68-4064     Michigan

WILLIAM KOPEC      01 Aug 1914     Apr 1979     48212 (Hamtramck, Wayne, MI)     48071 (Madison Heights, Oakland, MI)     377-09-8668     Michigan

http://www.bryanfamilyonline.com/Stezowski.Koldras/Koldras.html — Charlotte (b. 1915 Chicago), married Tony Kopec (08.02.1914-07.10.1997), who had got twin brother John (but died two weeks old). Tony Kopec was one of twelve children. His parents were Casimir and Josephine(Skawinska) Kopec […]