Document qko9vMbaBapk4N9nN8JJKkwGE

R.O. Box 1043 Hunt Volley. MD 21030 11557 Edmonston Road Beltsville. MO 20705 319 J Westtowr* Road West Chester. PA 19382 1490 Zephyr Avenue Hoyward. CA 94544 2413 Lee Avenue South El Monte. CA 91733 Toll Free 1-800-547-0128 MJL J ARCOR t jMechanical Asbestos Removal. Inc. Dear Client: Re: Negative AirFiltrationSystems on Asbestos Abatement Work Sites ' The Federal (29CFR1926.58) This procedure August 5, 1986. 0SHA Asbestos Standard for the Construction Industry requires the use of the above referenced system. has been protected by U.S. Patent #4,604,111 effective Upon advice of council, MARCOR has applied for and has been granted a license authorizing use of this negative air system. This license was an unexpected expense, but the simple facts are that in order to protect our clients and ourselves against blatant patent infringement we have no choice but to become an authorized user, by the patent owner. We look upon this license issue as we would any other requirement, if it's needed to get the job done properly we have no choice in the matter but to obtain it. That's why you pay us. Please direct any questions on this matter to Hr. Lawrence Michaels, Esquire, Fox, Rothschild, O'Brien & Frankel, 2000 Market Street, Philadelphia, Pennsylvania 19103, (215) 299-2066. Sincerely, A. Richard A. Clarke President RAC/1lp P.O. Box 1043 Hunt Valley, Maryland 21030 Phone (301) 785-2525 GLEASON-001158