Olsen and Johnson used hundreds of gag props and mechanical devices over the course of their partnership. As vaudevillians they safeguarded some of these specialties by submitting detailed descriptions and diagrams to National Vaudeville Artists, Inc.'s Protected Material Department, "extensively used for years by the creators of gags, routines, skits, stunts, and unique specialties." Fellow vaudeville comedian
Fred Allen described the procedure in his memoir: "Any member could protect his act. All he had to do was to enclose a copy of his material in a sealed envelope and deliver it to the N.V.A. office. The envelope was placed in the Protected Material files. Later, if a plagiarist was brought to bay, the act preferred charges, the sealed envelope was opened, and the N.V.A. officials dispensed justice. Hundreds of acts protected their material through this service. After
Albee's death, vaudeville started over the hill and took the N.V.A. club with it." The N.V.A. office finally discontinued the Protected Material Department on September 15, 1947, "owing to lack of space." The originators of the material were invited to claim it in person; after 30 days the N.V.A. would dispose of the files left unclaimed. Ole Olsen remembered the storehouse of gags contained in the files, and purchased all of the remaining material that had been abandoned. Olsen had long been a collector of theatrical memorabilia. In June 1947 he paid $5,000 ($71,703 in 2025) for the entire published and unpublished material—40 years' worth—of author
James Madison. ''Madison's Budget'' was a regularly published compendium of jokes, sketches, and song lyrics sold to vaudevillians at one dollar per issue. Olsen also bought the effects of stage producer
Ned Wayburn, including many
Will Rogers monologues. By the 1950s Olsen had compiled a comprehensive library of venerable gag material, storing it on his property in Malvern, Long Island. He valued the library at $250,000 ($2,845,186 in 2025) and made it available to professional writers in 1957. This was front-page news for
Variety, which described the "humor library" as containing "over 3,000 volumes, including the original
Joe Miller books and a complete collection of
Punch. All gags are cross-filed. Olsen will let would-be humorists look at it by the hour at the following rates: $100 per hour for all you can tape record; $50 per hour for all you can write down; and $25 an hour for all you can remember." ==Philanthropy==