Stationary Lights Over Portland OR Around 1960

Talking with a friend about the recent sightings (April 29/30, 2006), I thought the following might be of topical inerest although it was a long time ago and I don't recall the exact date.
 Looking out of our picture window towards the SE, on a hill in SW Portland, my Dad, my Mother and myself saw in the evening sky what I remember to be 3 stationary oblong lights hovering over the Wilamette Valley.  
They remained there at least for 10 minutes, and my father called  -- I believe -- the Oregonian to report it.  I remember that the paper said they had received a number of calls on it. 
I also remember that the paper printed a squib about it after that, basically saying that stationary lights were observed over the city and that the Air Force was notified, and that the Air Force indicated that it would look into it.  
I don't recall any followup on the story. I just wish I had more of the facts.
Witness indicates that the date of the event is approximate.  PD