In no case shall a contract for any material, machinery or process which is patented, or the supply of which is controlled by one person or company, be let with the contract for work or for other material or machinery.
53 P.S. § 23309
In no case shall a contract for any material, machinery or process which is patented, or the supply of which is controlled by one person or company, be let with the contract for work or for other material or machinery.
53 P.S. § 23309