Just when did the 1st electric fire alarm system get invented?
#throwbackthursday #electricfirealarm #inventions #firesafety #safetyfirst #firealarms #innovation #inventor #fire #smoke #safety #alarms #alarmsystem
#firealarmsystems #southerncalifornia
http://advancedalarmandfireinc.com
10/17/2019, 11:05:32 PM