UL-1971 Standard for Signaling Devices for the Hearing Impaired

UL-1971 - 4TH EDITION - CURRENT
Show Complete Document History

Included in this current edition are the following subparts:

 4TH 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


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Document Number

UL-1971

Revision Level

4TH EDITION

Status

Current

Publication Date

Nov. 29, 2002

Page Count

86 pages