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Seems like it is a bit too late. http://www.sw-box.com/Professional-Screw-Driver-Opening-Tool-For-Iphone-4.html

Probably already posted elsewhere, but here is a $3 solution:

http://www.blog.sw-box.com/cell-phone-accessories/cheap-pentalobular-screw-driver-for-only-2-35-on-sw-box-com/

Who needed Google? That's linked from TFA. In fact, TFA is a slashvertisement for their screwdriver for $10. If you actually had looked beyond the first hit, you would have found ones for 1/4 the price. eg, http://www.sw-box.com/Professional-Screw-Driver-Opening-Tool-For-Iphone-4.html : $2.35

The screw desing patented in 1974 is for a "Method of making a thread forming screw". It has noting to do with the bit head.

Cheap Pentalobular screw driver for only $2.35 on sw-box.com ...
Shipped directly from China, with as much as $32.60 shipping fee to California.

Doing a quick search and jumping to conclusion from the listing... OP is a karma whore. The patent find is bogus. His "cheap and easy to find" screw driver is a scam. No part of his post is insightful, the mods are doing crack again.

They already do this on their new laptops. Just buy the damn screw driver for $3.00 and stop worrying about it. It's for the best anyway, we don't need kids opening up their macbooks and breaking shit. If you know how to fix it, you can obtain the screw driver.

http://www.sw-box.com/Professional-Screw-Driver-Opening-Tool-For-Iphone-4.html

"Professorial Pentagram Screw Driver Opening Tool for iPhone 4"

http://www.sw-box.com/Professional-Screw-Driver-Opening-Tool-For-Iphone-4.html

http://www.sw-box.com/Professional-Screw-Driver-Opening-Tool-For-Iphone-4.html

http://www.blog.sw-box.com/cell-phone-accessories/cheap-pentalobular-screw-driver-for-only-2-35-on-sw-box-com/ Don't even have to go that far! iPhone 4 opening tool for $2.97

They are already available. Nothing to see here. In fact this was discussed on slashdot a couple months ago.