These included postcards, prints and photographs.
Though the zoo has never released exact numbers, Knut merchandise including postcards, key chains, candy and stuffed Knuts have brought in hundreds of thousands of euros.
As the day progressed, it said, the ban was extended to anything related to the buildings, including postcards, posters and other collectibles.
Yoko Ono, Lennon's widow, has agreed to help compile a collection of the singer's correspondence, including postcards and doodles, to be published in October 2012.
But he said that artists and their heirs had become much more protective of their copyrights since "the explosion of ancillary merchandise," including postcards, posters, calendars, umbrellas and coffee mugs sold in museum stores and elsewhere.
As a result, Streep tried to change her popular image by appearing in a handful of comedies, including Postcards from the Edge (1990) and Death Becomes Her (1992), and in the action-adventure film The River Wild (1994).
He produced a movie here and there, including "Postcards From the Edge" (1990), but did not fully resurface until 1993, when the talent agent Michael Ovitz engineered Mr. Calley's takeover of a troubled United Artists.
Though the zoo has never released exact numbers, its range of Knut merchandise, including postcards, key rings, sweets and stuffed Knuts costing up to €29.95£25.9090) each, has brought in hundreds of thousands of euros.
While Hallmark has no firm plans to have a presence on social networking sites, American Greetings in mid-July introduced kiwee.com, which offers free social expressions, including postcards and emoticons, that can be posted to MySpace and MSN accounts.
