patents%3Fvid=USPAT5827992&id=9BIZAAAAEBAJ&printsec=abstract&zoom=4&dq=5,827,992%23PPA9,M1

patents%3Fvid=USPAT5827992&id=9BIZAAAAEBAJ&printsec=abstract&zoom=4&dq=5,827,992%23PPA9,M1