This section is from the book "The Law Of Contracts", by William Herbert Page. Also available from Amazon: Commercial Contracts: A Practical Guide to Deals, Contracts, Agreements and Promises.
Statutes which forbid the transaction of certain kinds of business on Sunday are valid.1 Statutes limiting the rate of interest which may be contracted for are valid,2 and accordingly a statute limiting the rate at which a banker can discount paper has been upheld.3 Statutes regulating the sale of patent-rights are valid,4 and a state statute requiring a vendor of a patent right to file a copy of his letters patent with the clerk of the court before selling such rights has been upheld.5
 
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