This is a timeline that includes important laws and legislation affecting individuals with disabilities in the United States.

References:

http://isc.temple.edu/neighbor/ds/disabilityrightstimeline.htm
http://en.wikipedia.org/wiki/Disability_rights_timeline 
http://www.disabilityhistory.org/timeline_new.html 
http://www.ncld-youth.info/index.php?id=61 
http://bancroft.berkeley.edu/collections/drilm/resources/timeline.html