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33 L. Q. Rev. 63 (1917)
Privy Council Law and Practice of Letters Patent for Invention From the Restoration to 1794 I

handle is hein.journals/lqr33 and id is 71 raw text is: PRIVY COUNCIL LAW AND PRACTICE OF LETTERS PATENT FOR INVENTION FROM THE RESTORATION TO 1794. L N July, :i9o% I suggested in these pages that an examination of the Records of the Privy Council would probably yield material for a history of Patent Law from the Statute of Monopolies to Dollond's case (1766), this period being almost barren of recorded Common Law decisions. The removal of these Records from Whitehall to the Record Office has enabled me to carry out this investigation for the greater portion of the period concerned, and I now submit the results to the consideration of those curious in these matters. The material collected has been arranged in chronological order, and is probably a complete record of revocation cases by the Council for the period covered. I have, however, included all cases of Patent Law procedure calculated to throw light upon the practice of the Crown in the regulation of its grants. Unless otherwise stated, the authority for my statements must be under- stood to be the Registers of the Privy Council; but collateral sources have been freely utilized: for the Council, not being an Office of Record, allowed its papers to stray freely into other colections, public and private. Where a patent is not represented in the Official Series a reference to the Patent Roll has been given. It will be seen that the Official Series is far from complete for the early years of the Restoration period. A list of Cromwellian patents compiled by Mr. Rhys Jenkins, of the Patent Office, will be found in Notes and Queries, II S., vii, p. 163. ,66o. Ti'eswel's Patent (Patent Roll, in Car. II, pt. !o, No. io). The invention is for a mill to grind corn and sugar canes, and to drain mines. In 1663 James Streete obtained a patent (.Patent Roll, 15 Car. II, pt. ix, No. 8) for the same purposes. In the recital of the latter patent it is alleged that Treswell had obtained an insight into the mill erected by Streete, and by other intercourse with him had presumed to erect a mill conducing to the same effect, but had not been able to perform the same, and that Streete

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