This work is in the public domain because it was published in the United States between 1929 and 1963, and although there may or may not have been a copyright notice, the copyright was not renewed. For further explanation, see Commons:Hirtle chart and the copyright renewal logs. Note that it may still be copyrighted in jurisdictions that do not apply the rule of the shorter term for US works (depending on the date of the author's death), such as Canada (70 years p.m.a.), Mainland China (50 years p.m.a., not Hong Kong or Macao), Germany (70 years p.m.a.), Mexico (100 years p.m.a.), Switzerland (70 years p.m.a.), and other countries with individual treaties.
A search of the govt. copyright site tells me copyright for the pre-1964 issues of The San Mateo Times was not renewed which means all their pre-1964 publications are now public domain. A search of "The Times, San Mateo" returned 14 entries, none of which are pre-1964. I also searched for a few variants such as "The San Mateo Times", "The Times of San Mateo," "Times, San Mateo," "The Times, San Mateo" and so on. No entries. All these are news items published in that paper.
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