hazeltine research

[Phil Nelson]

Originally Posted by svv1jww

still trying to find exact year model of tv.just trying to narrow it down.

You probably know this, but patent dates are an imprecise way of dating an old TV or radio.

If you see a patent date (or number) on a label, that means the device could not have been made before the patent was granted. But it could have been made a considerable time after that date, since patents, and licenses to use patented technology, remain in force for years.

Phil Nelson