Shutterstock_182772785If you've handled a bunch of patent cases without running across the Kessler doctrine, don't feel like the Lone Ranger. Until today, IP wizards like you likely had little cause to know about the patent-claim-killing rule that sprang more than a century ago from Kessler v. Eldred, 206 U.S. 285 (1907). Be warned. It's

That homologous recombination occurs between the targeted DNA and an introduced plasmid that is homologous to a chromosome does not require that the targeted DNA actually be chromosomal DNA. It requires only that the targeted DNA be homologous to chromosomal DNA. Non-chromosomal DNA, such as mitochondrial DNA or DNA in an additional plasmid, can be