Muller vs. Oregon 1908.
“'Sec. 1. That no female (shall) be employed in any mechanical establishment, or factory, or laundry in this state more than ten hours during any one day. The hours of work may be so arranged as to permit the employment of females [208 U.S. 412, 417] at any time so that they shall not work more than ten hours during the twenty-four hours of any one day”
U.S Supreme Court justified both sex discrimination and usage of labor laws during the time period. The case upheld Oregon state restrictions on the working hours of women as justified by the special state interest in protecting women's health.
Curt Muller, the owner of a laundry business, was convicted of violating Oregon labor laws by making a female employee work more than ten hours in a single day. Muller was fined $10 and felt that he did nothing wrong.