The patent was issued in 1991 at a time when US patents had a 17 year
life. So the patent is expired. Anyone want to build it? :-)
Chuck Norcutt
Charles Geilfuss wrote:
> That is so far over my head it is not even funny.
>
> Charlie
>
> On Thu, Aug 12, 2010 at 10:06 AM, Sawyer, Edward <Ed.Sawyer@xxxxxxx> wrote:
>
>> If you want to read the original patent for this lens (and the source of
>> much of the info in Marco's article), here it is:
>>
>> http://tinyurl.com/23bufp4
>>
>> There's a lot of interesting Olympus patents out there. I found the ones
>> for the 18 (2 different ones, at different times actually), 24shift, 21/2
>> and a 28/1.4 with plastic aspherical element (that was never released,
>> unfortunately).
>>
>> Patents make pretty interesting reading as far as lenses go.
>>
>> -Ed
>> --
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>>
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