The Supreme Court dismissed an appeal regarding the prosecution of manufacturers for issuing a false warranty. The Court held that: 1) The Prevention of Food Adulteration Act does not require Food Inspectors to join manufacturers/warrantors in complaints against vendors. Section 20A allows but does not mandate their joinder to avoid conflicting judgments. 2) Not impleading manufacturers/warrantors in a vendor's trial does not bar their subsequent separate prosecution. Section 20A aims to prevent conflicting rulings, not provide immunity from separate trials for warrantors. 3) Whether a joint or separate trial is more advantageous cannot be predetermined, so claims of discrimination due to unguided discretion in choosing