4 ms·
Title is a bit misleading. Looks like this patent actually expired quite a while ago, as it was filed in 1974 and granted in 1975. I think it would have expire
by bonyt 11y ago
Title is a bit misleading. Looks like this patent actually expired quite a while ago, as it was filed in 1974 and granted in 1975. I think it would have expired 17 years from the date it issued, or Feb. 18, 1992.
- pwg 11y agoYou are correct in your computation of the expiration date. Why this was posted now, when it expired over 20 years ago, I am unsure.