UL-1971 › Standard for Signaling Devices for the Hearing Impaired
Included in this current edition are the following subparts:
3RD EDITION - Nov. 29, 2002
CHANGE 05/04 - May 3, 2004
CHANGE 07/05 - July 20, 2005
CHANGE 05/06 - May 19, 2006
CHANGE 10/08 - Oct. 15, 2008
CHANGE 10/13 - Oct. 31, 2013
CHANGE 08/18 - Aug. 29, 2018
CHANGE 05/04 - May 3, 2004
CHANGE 07/05 - July 20, 2005
CHANGE 05/06 - May 19, 2006
CHANGE 10/08 - Oct. 15, 2008
CHANGE 10/13 - Oct. 31, 2013
CHANGE 08/18 - Aug. 29, 2018
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Document Number
UL-1971
Revision Level
3RD EDITION
Status
Current
Publication Date
Nov. 29, 2002
Page Count
64 pages