| |
Bad form, replying to my own post, but...
In lugnet.off-topic.fun, Susan Hoover wrote:
> I tried to find the patent for RPN calcs on both
> <http://patent.womplex.ibm.com/> and <http://www.uspto.gov/>, but
> neither one goes back far enough. The USPTO site only goes back to
> 1976; the IBM site goes back to 1971. RPN is definitely older than
> that; I'm not sure when it was first implemented in a
> desktop/handheld calculator.
<http://www.hpmuseum.org/rpnvers.htm> has the history from the HP
viewpoint.
--
Susan Hoover
Houston, TX
|
|
Message is in Reply To:
 | | Re: Purimish fun
|
| (...) HP was not the only manufacturer of RPN calculators; I remember using a National Semiconductor RPN calc in the mid-70's. See (URL) for more non-HP RPN calcs. I tried to find the patent for RPN calcs on both (URL) and (URL), but neither one (...) (25 years ago, 27-Mar-00, to lugnet.off-topic.fun)
|
4 Messages in This Thread:
 
- Entire Thread on One Page:
- Nested:
All | Brief | Compact | Dots
Linear:
All | Brief | Compact
|
|
|
|
