I googled the patent number and found the following info. The figures on the patent sketches looks slightly different than the piece. Patent number: US 3497806
Bogen Atlas Sound 8" Commercial PA Speaker Grille Assembly NEW S86-T725 25v 70v. This is a commercial speaker for PA (public address) amplifiers with either 25V or 70V output. There are 6 tap settings for each output voltage: 1/8W, 1/4W , 1/2W, 1W, 2W, & 4W.
The only FM approved and D.O.T. compliant safety can with an integrated fill-and-pour spout is now available at a very affordable price. Compliance with Department of Transportation regulations for over-the-road transport of flammables is simpler and more affordable than ever with Justrite's D.O.T.
DBCI 650 mini series roll up door. Comes with all the brackets,tracks, and hardware needed for installation. Comes with either inside or outside locks (Customer must specify) .
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