A surety; a bondsman. One who binds himself in a bond with the principal for greater security. He is still a cautioner whether the bond be to pay a debt or whether he undertake to produce the person of the party for whom he is bound. Bell, Dict. CAVEAT (Lat. let him beware). In Practice. A notice not to do an act, given to some officer, ministerial or judicial, by a party having an interest in the matter. It is a formal caution or warning not to do the act mentioned, and is addressed frequently to pre- vent the admission of wills to probate, the granting letters of administration, etc. See Williams, Ex. 581. 1 Burn, Eccl. Law 19, 263; Nelson, Abr.; Dane, Abr.; Ayliffe, Parerg.; 3 Bla. Com. 246; 2 Chit. Pr. 502, note b; 3 Redf. Wills 119; 4 Brew. Pr. 3974; Poph. 133; 1 Sid. 371; 8 Binn. 314; 8 Halst. 189. In Patent Law. A legal notice to the patent office that the caveator claims as inventor, in order to prevent the issue of a patent on a particular device to any other person without notice to the caveator. It gives no advantage to the caveator over any rival claimant, but only secures to him an opportunity to establish his priority of in- vention. It is filed in the patent office under statu- tory regulations; U. S. Rev. Stat. § 4902; and an alien resident for one year, having made oath of his intention to become a citi- zen, has the same privilege; id. The prin- cipal object of filing it is to obtain for an inventor time to perfect his invention with- out the risk of having a patent granted to another person for the same thing. Upon the filing of such caveat and the payment of the proper fee, the law provides that if application be made within the year for a patent with which the caveat would in any manner interfere, the commissioner shall deposit the drawings, etc., of such application in the confidential archives of his office, and give notice thereof by mail to the person filing the caveat, who, if he would avail himself of his caveat, shall file his description, etc., within three months of the mailing of the notice, with allowance for the usual time of transuaission; U. 8. Rev. Stat. § 4902. As to the form of the caveat, it need con- tain nothing more than simply an intelligi- ble description of any invention which the caveator claims to have made, giving its distinguishing characteristics, with suf- ficient precision to enable the office to de- termine whether there is a probable inter- ference, when a subsequent application is filed. It amounts in effect to a notice to the office not to grant a patent for the same thing to another without giving the cave- ator an opportunity to show his better title to the same. A caveat cannot be with- drawn, but copies may be obtained and any correction or addition must be filed on a separate paper; Rob. Pat. § 445. It is evi- dence of the date of the invention described, and may be proof that the invention was prior to the time of filing; id. § 446; but it does not estop the caveator from the claim that his invention was perfect; id. § 446. It is not assignable, but the invention may be transferred and the caveat may be used to identify it; id. § 447. A caveator is not concluded by the description of his inven- tion in the caveat; id. § 448. See PATENTS, It is also used to prevent the issue of land patents; 9 Gratt. 508; 1 Wash. 50; 3Md. 230; and where surveys are returned to the land office, and marked "in dispute," this entry has the effect of a caveat against their acceptance; 43 Pa. 197. CAVEAT EMPTOR (Lat. let the pur- chaser take care). In every sale of real property, a purchaser's right to relief at law or in equity on account of defects or in- cumbrances in or upon the property sold depends solely upon the covenants for title which he has received; 2 Sugd. Vend, 425; Co. Litt. 384 a, Butl. note; Dougl. 665; 2 Freem. 1; 3 Swanst. 651; 1 Coke 1; 17 Pick. 475; 10 Ga. 311; 1 S. & R. 52; unless there be fraud on the part of the vendor; 3 B. & P. 162; 30 Me. 266; 2 Johns. Ch. 519; 5 id. 79; 9 N. Y. 36; 24 Pa. 142; 3 Md. Ch. Dec. 851; 1 Spenc. 353; 66 N. C. 233; 70 id. 718; 4 111. 334; 76 id. 71; 8 Leigh 658; 7 Gratt. 238; 15 B. Monr. 627; Freem. Ch. 134, 276; 3 Ired. Eq. 408; 8 Humphr. 347; 5 Ia. 293; 89 Tex. 177; and consult Rawle, Cov. for Title, 5th ed. § 319. This doctrine applies to a sale made under a decree fore- closing a mortgage, and the purchaser can- not rely upon statements made by the officer conducting the sales; 35 Neb. 466. In sales of personal property substantially the same rule applies, and is thus stated in Story, Sales, 3d ed. § 348:-The purchaser buys at his own risk, unless the seller gives an express warranty, or unless the law im- plies a warranty from the circumstances of the case or the nature of the thing sold, or unless the seller be guilty of fraudulent misrepresentation or concealment in re- spect to a material inducement to the sale; Benj. Sales, § 611; 10 Wall. 383; 4 Johns. 421; 53 N. Y. 515; 82 Pa. 441; 11 Metc. 559; 33 Ia. 1