Design Notes for Low Cost Eyeglasses

FYI - Here's some information you might find useful in designing Low Cost Eyeglasses.

As a start, how about these old Eyeglasses patents that have expired due to age (generally more than 20 years old from the filing date). Expired patents are free to use by anyone.
MAGNETIC BI-FOCAL LENS HOLDERUS Pat. 2737847 - Filed Oct 20, 1952
FLEXIBLE FRESNEL REFRACTING MEMBRANE ADHERED TO OPHTHALMIC LENSUS Pat. 3628854 - Filed Dec 8, 1969
OPHTHALMIC DEVICEUS Pat. 2273434 - Filed Jun 19, 1940 - f twenty
SOFT FRAME ADJUSTABLE EYEGLASSESUS Pat. 3378851 - Filed Jul 6, 1966
LENSLESS OPTHALMIC DEVICEUS Pat. 3876294 - Filed Aug 17, 1973
EYEGLASSES OR SPECTACLESUS Pat. 1230136
PORTABLE VISUAL FUNCTION TESTERUS Pat. H293 - Filed May 29, 1986
PORTABLE VISION TESTING DEVICEUS Pat. 2622474 - Filed Jan 9, 1952
Vision screening kitUS Pat. 4279479 - Filed May 29, 1980
TESTING VISIONUS Pat. 1500248 - Filed Aug 17, 1922
METHOD OF TESTING VISIONUS Pat. 1686962 - Filed May 28, 1921
EYE TESTING DEVICEUS Pat. 1384252 - Filed May 29, 1920

To search for more Eyeglasses patents, try the following. Please remember that newer patents are probably not expired, and therefore active.

For a Worldwide search, go to esp@cenet.
1 - In the "International Patent Classification (IPC)" field, copy and paste in the following - G02C OR A61B
2 - In the "Keyword(s) in title or abstract" field, copy and paste in the following - eyeglass* OR spectacle*
3 - Press SEARCH. View your results.

For the U.S. only, go to U.S. Issued Patents.
1- In the "Query" field, copy and paste in the following - CCL/351/$ AND ABST/(eyeglass$ OR spectacle$)
2 - Press SEARCH. View your results.

For the latest in U.S. only, go to U.S. Published Applications.
1- In the "Query" field, paste in the same search string above.
2- Press SEARCH. View your results.

In addition, here's some other information you might find interesting.
JP7. Make your own glasses. ( spectacles.)
Eyeglasses - especially history

So what can you do with all this information? Here's some suggestions.
+ You could make and sell the device described in the expired patent. Please note that just because something is patented or written, it might not work all that well or might not be safe in today's standards. Use your own judgment, or seek help, to stay safe and out of trouble.
+ You could "translate" the expired patent into easy-to-understand instructions for others to make the device. These instructions could use easy-to-find materials, like trees, plants, rocks, people, scrap materials, etc.
+ You could recruit the inventors or authors to help you, since they are experts in their field. Some of the inventors of older patents might be retired now and might be looking for something to do.
+ Existing manufacturers of Eyeglasses could use this information to make their already fine products even better, more efficient, or less expensive.
+ You could use the information to brainstorm new ideas. Build on the work of others.

Here's some brainstorming ticklers to help you launch in new directions around the topic of Eyeglasses.
DISPLAY CARDUS Pat. 2212596 - Filed Jun 14, 1939
MEANS FOR ATTACHING SUNSHADE GLASSES TO SPECTACLESUS Pat. 2065458 - Filed Mar 27, 1936
LAMINATED MULTI-FOCAL LENSESUS Pat. 3877798 - Filed Sep 3, 1970

That's about all for now. As background, the site "Design for the Other 90%" said to "GET INVOLVED", so I did. I plan to continue posting these LOW COST DESIGN TOPICS on my Blog for a while yet. Let me know if you have a topic you would like covered. I'm open to suggestions on improving my blog format, too. Please e-mail me directly.

I hope you find this helpful. I'm sure you can do much better though! Good Luck!

For more of my LOW COST DESIGN TOPICS - Click on the tag below "design for the other 90%".

See disclaimers on TG Ideas LLC publications and website - http://www.athenet.net/~ideas/,

Thanks!