TRENDS & TANGENTS.

This section offers business news briefs as of April 1, 1965. U.S. airlines have reported around 61 billion revenue passenger miles in 1964 on their domestic and international routes, with Boeing accounting for nearly half of the total revenue passenger miles. The U.S. Patent Office has reported that it issued a record number of trademark registrations in 1964. The Atomic Energy Commission has tested a low-thrust rocket engine called The Poodle at its laboratory in Miamisburg, Ohio.