Cutlery and Allied Trades Research Association knowledge which is available to everyone on a competitive fee paying basis, however CATRA will enter into dialogue with consumers and users of cutlery, knives and tools where their expertise may be of help, on a free of charge basis. Petersen's Bowhunting magazine uses CATRA to measure sharpness of arrowheads. CATRA manufactures a wide range of special purpose equipment including knife and cutlery testing machines and knife sharpening systems including the CATRAHONE and CATRASHARP machines Cutlery and Allied Trades Research Association Cutlery and Allied Trades Research Association (CATRA) is an internationally known research and technology organisation in Sheffield, England which
Henry D. Messer the group under a pseudonym, which was the most common practice for members of the organization at that time. Messer also participated in the Stonewall riots of 1969. Around 1970, Messer and House hosted a meeting with Mattachine members and New York City Councilman Eldon R. Clingan, where the members of the organization shared their firsthand accounts of discrimination with the city leader. Clingan and Councilman Carter Burden introduced a bill in 1971, which Messer helped author, that would have prohibited discrimination in employment and housing on the basis of sexual orientation in New York City. The bill was unsuccessful