Patent Law

Edison and the light bulb

By Lawrence B. Ebert, Esq.

i'm a Chinese undergarduate, your blog is very interesting and helpful.since i can not find your email ,i have to use the "comment" to ask some questions about edison's patent here,i am sorry but still hope that you can help,you may find them veey childish even ridiculous, first: edison got the 223,898 patent Jan,1880 and then the patent was ruled invalid in 1883,right? then he got around six years in litigation and finally got the patent valid 1889,right? Second, suppose i got them all right above, can a patent in litigation be used to against others? the edison company sued some other companies in 1885 and one of the claimed infinged patents was 223,898,but then the patent was invalid ,how can they do that Third, this may fall out of your expertise,but what exactly 223,898 patented? the improvememt on the process of making Filment or a whole new filment . Fourth: Chiese students have long been taught that Edison invented "electric light", i know he was actually improved that ,but are there any differences between "electric light " and "electric incandescent light" or " incandescent light" when we talking about edison's inventions?

Relevant prior posts on IPBiz -->

How badly Jaffe and Lerner misunderstood the light bulb story

More Edison and the light bulb

New York Times: Edison's light bulb not essentially original

In passing, one should also note the coverage by the New York Times on Lincoln's Gettysburg Address, which reproduced Lincoln's text, followed by Democratic governor Seymour's remarks. [The Chicago Times wrote: "The cheek of every American must tingle with shame as he reads the silly, flat and dishwatery utterances of the man who has to be pointed out to intelligent foreigners as the President of the United States." ]

Full post as published by IPBiz on April 12, 2009 (boomark / email).