Includes: Abstracts of Chemical Patents booklets; "Patents at Work" pamphlet; "Index and Guide to Enemy Patents vested in the Alien Property Custodian" foldouts; "How to get a licence under a patent owned by the Alien Property Custodian" broadside; and a letter from Howland H. Sargeant, Chief Division of Patent Administration, Office of the Alien Property Custodian to the Franklin Institute.