• The ticket came with an "I Visited Bozo's Circus" pin attached; the marks where the pin was attached to it can be seen on the image.
• The ticket has no copyright marks as can be seen on the front and back of the image. The pin has no visible copyright information.
• The ticket can be dated by the date it was valid for the television show.
• Both the ticket and the pin were issued by WGN-TV as promotional items for the show and for the station. Tickets for radio and television shows are given for the asking by networks and broadcasting stations. In the case of the Bozo Show, there was once an 8-10 year wait for the tickets issued to be valid for a broadcast date.

From Cornell University: Cornell University The Cornell information indicates this image is in the public domain:

"For works first registered or publisher in the US: "1923 through 1977 "Published without a copyright notice "None. In the public domain due to failure to comply with required formalities."

There is no evidence any copyrights are claimed on either of these items.

• United States Copyright Office page 2 "Visually Perceptible Copies The notice for visually perceptible copies should contain all three elements described below. They should appear together or in close proximity on the copies.

1 The symbol © (letter C in a circle); the word “Copyright”; or the abbreviation “Copr.”

2 The year of first publication. If the work is a derivative work or a compilation incorporating previously published material, the year date of first publication of the derivative work or compilation is sufficient. Examples of derivative works are translations or dramatizations; an example of a compilation is an anthology. The year may be omitted when a pictorial, graphic, or sculptural work, with accompanying textual matter, if any, is reproduced in or on greeting cards, postcards, stationery, jewelry, dolls, toys, or useful articles.

3 The name of the copyright owner, an abbreviation by which the name can be recognized, or a generally known alternative designation of owner.1 Example © 2007 Jane Doe."