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Microsoft vs. Burst.com
rocketjam writes "Robert X. Cringley has an interesting story on one of Microsoft's many little-known legal cases. Burst.com is suing Microsoft, claiming MS negotiated in bad faith for over a year before stealing Burst's patented technology for increasing the efficiency of video and audio streaming. After Microsoft submitted all emails associated with the their dealings with Burst to the court, Burst's lawyers discovered a 35-week gap of missing mail during a critical portion of the negotiations. When the judge learned the Sun vs. Microsoft antitrust case had revealed that MS keeps backups of all emails on over 100,000 tapes stored offsite, he ordered them to come up with the missing messages."
http://www.m-cam.com/~watsonj/usptohistory.html
The modern concept of the patent was established in England where, in 1449, King Henry VI awarded a patent to John of Utynam for stained glass manufacturing.
"Beginning in 1552, a series of "letters patents" was issued by the Crown. The monarchy began a trend of issuing patents for its own benefit and for the benefit of officers and friends of the Court.4 Patents were issued on entire industries, not just inventions. For example, the Stationers enjoyed complete control over the publishing industry in England. The balance of power soon shifted towards those whom the monarchy decided to favor. Reform began with reign of Queen Elizabeth I. Francis Bacon commented that the Queen would grant patents for any invention that she deemed useful to the country. In an effort to curb further abuses of power, Parliament, in 1624, passed the English Statute of Monopolies, which outlawed all royally sanctioned monopolies. Realizing the importance of protecting inventors and the economic benefits associated with encouraging innovation, an exception was allowed for patents of "new manufactures." These patents were awarded to the inventor as long as their new devices did not hurt trade or result in price increases. Additionally, a statutory limit of fourteen years was imposed on English patents."
Me personally? A lot. Like 3-4 emails per day are covered by NDA, and the lawyers make us put those silly little sigs that do nothing. Oh, and we use Thawte certificates to encrypt and sign every one of them (well, even the non-NDA ones usually, out of habit).
In the ASIC design industry, I'd say this is pretty common. All discussions between vendor and customer are under NDA, sometimes even before any discussions at all happen there are multiple NDAs in place. And lots of the business (even exchange of IP in source code attachments) takes place by email.
Other industries? I'm not sure.
everything in moderation