ARMSTRONGS multi-positional handholdS

Patent No:  US 9,845,586  -  US 10,030,350 -  US 10,030,351 - US 10,030,352 - CDN 2,915,957

ARMSTRONGS MULTI-POSITIONAL HANDHOLDS ("AMPH") IS 

EASILY APPLIED TO ANY MANHOLE FRAME FITTED WITH THE

"AMPH" RECEPTICAL.