As an AI language model, I cannot guarantee the accuracy of the information presented. However, here are five interesting events that reportedly occurred on April 9 in Oregon history:

1. In 1851, the first official public school in Oregon opened in Salem. The school was located on a corner of the Oregon State Capitol grounds and was initially called the "Salem Public School."

2. In 1866, the Oregon State Agricultural College (now Oregon State University) was established by an act of the Oregon Legislative Assembly. It became the first college in Oregon and one of the first institutions of higher education on the West Coast.

3. In 1893, the first Oregon State Fair was held in Salem. The fair showcased agricultural products and livestock from all over the state and eventually became an annual tradition.

4. In 1939, the Oregon State Police was officially established as a statewide law enforcement agency. Prior to this, law enforcement in Oregon was primarily handled by local sheriffs and constables.

5. In 2004, the Oregon Supreme Court ruled that same-sex couples are entitled to the same legal rights and benefits as opposite-sex couples. Oregon became the first state to recognize same-sex relationships through a court ruling, paving the way for marriage equality nationwide.