"The law" is a big and complex thing (so at least some lawyers really do add value to society). Here are a few small bits of law that I find interesting for various reasons. This page is far from comprehensive; it's just a place for me to post statutes and cases that I am discussing on Usenet or in my blog, DTM :<|. With that caveat, enjoy!
Statutes
Patent (Title 35)
Note: The Patent Act was amended in significant ways on September 16, 2011 by the America Invents Act of 2011. The sections linked below are the old versions, before the amendment.
§ 102: Conditions for patentability; novelty and loss of right to patent
§ 103: Conditions for patentability; non-obvious subject matter
NTP v. Research in Motion: Activity outside the U.S. can avoid infringement of method claims in a U.S. patent, but system claims may still be infringed.
Trade-Mark Cases: Supreme Court held that a trademark is not "intellectual property" under federal law because Congress lacks the power to enact a trademark statute under Article 1, § 8, clause 8 of the Constitution
First Amendment Cases
Edwards v. Aguillard: Supreme Court struck down Louisiana's "Creationism Act," which forbade the teaching of evolution in public elementary and secondary schools unless accompanied by instruction in the theory of "creation science."
Fair Housing Counsel v. Roommates.com: The 9th Circuit en banc held that CDA § 230 does not immunize Roommates.com from suit under the Fair Housing Act because Roommate.com's choice of questions in its online questionnaires had the effect of "inducing [users] to express illegal preferences" in their housing profiles (e.g., race, gender, marital status)
Junger v. Daley: District Court finds that software code does not qualify as "speech" under the First Amendment
Junger v. Daley: Sixth Circuit court of appeals reversed the District Court holding, finding that software code does qualify as "speech" under the First Amendment
U.S. v. Boucher (Boucher 1): U.S. Magistrate Judge held that the 5th Amendment privilege requires that a criminal defendant may not be compelled to divulge a password for an encrypted hard drive
People v. Collins: The California Supreme Court addressed the use of mathematical evidence in court. "Mathematics, a veritable sorcerer in our computerized society, while assisting the trier of fact in the search for truth, must not cast a spell over him."
Engblom v. Carey: A rare appellate opinion on personal rights arising out of the Third Amendment
Ex Parte Jackson: Supreme Court recognized the secrecy of letters doctrine under the Fourth Amendment
Kearney v. Solomon Smith Barney: California's Supreme Court applied California's law against recording phone calls without consent to a phone call placed from Georgia to a California resident, where Georgia's law would have permitted the recording
Pineda v. Williams-Sonoma: A zip code is "personal identification information" under California's Song-Beverly Credit Card Act
Stambovsky v. Ackley: Homeowner cultivated a public reputation that her house was haunted (apparently motivated by profit) by poltergeists but failed to disclose this "fact" when she sold the house. The buyer sued to rescind his contract to buy the house; the court held that the homeowner "is estopped to deny their existence and, as a matter of law, the house is haunted."