DescripciónHolt tractor Soldier Field Chicago 1924.JPG
Photo of a Holt 10 ton tractor at Soldier Field, Chicago, in 1924. Since Soldier Field was not completed until the fall of 1924 and appears to still be under construction by this photo, it appears that the Holt tractor pictured was involved in the construction of the stadium. The Holt Company became part of the Caterpillar Company in 1925. The Caterpillar Company issued a series of historical photos from their old negatives in 1964, which included this one from the Holt Company.
There are no copyright marks on as can be seen by the front and back views. While the original negative and any possible photos date before 1925, I have licensed this as PD-pre-1978 as the Caterpillar Company issued a new set of photos from the original negatives and did not place any copyright marks on them.
At lower right, there's a series of numbers which are the original negative's number; this number is also seen below it in reverse.
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.
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.
Este archivo se encuentra en el dominio público en los Estados Unidos porque fue publicado en ese país entre los años 1929 y 1977 (ambos incluidos) sin haber indicado un aviso de derechos de autor. A menos que su autor haya fallecido años antes, se mantiene bajo propiedad intelectual en los países o zonas que no aplican la regla del plazo más corto para las obras estadounidenses, como Canadá (50 años p.m.a.), China continental (50 años, a excepción de Hong Kong o Macao), Alemania (70), Suiza (70), México (100) y otros países con reglas particulares. Vea esta página y este diagrama como referencia e información.
{{Information |Description=Photo of a Holt 10 ton tractor at Soldier Field, Chicago, in 1924. Since Soldier Field was not completed until the fall of 1924 and appears to still be under construction by this photo, it appears that the Holt tractor pictured