Group One    
Patent No. Year Title Author/Inventor/Manufacturer Address Date of Application Date of Acceptance Invention Notes
20,606 1906 Improvements in Dental Tools Robinson, Leo Shenstone 2237 San Antonio Ave., Alameda, CA September 17, 1906 January 17, 1907 Relates to rotary abrading, cleaning and polishing tools used in the practice of dentistry, and pertains especially to the combination by novel means in a unifed structure of a dental disc, or grinding and polishing annulus, and a hollow mandrel.
12,306 1906 Improvements in Drilling Apparatus especially such as is suitable for the use of Dentists Repsold, Paul Kaufstr. 3 II, Livonia, Russia May 26, 1906 August 16, 1906 A drill, more especially of the kind suitable for use in dental operations, comprising a holder or casing which surrounds the handle and whose fore end firmly grips the drill, whilst at its rear end there is provided an elastic connection with the handle for the purpose of damping the vibrations of the drill and of the handle, and thus enabling the drilling to be performed steadily and without vibration. Date claimed for Patent under Patents Act, 1901, being date of first Foreign Application (in Germany), December 11, 1905
14,854 1906 Improvements in Drilling Apparatus especially such as is suitable for the use of Dentists Repsold, Paul Kaufstr. 3 II, Livonia, Russia June 30, 1906 December 31, 1906 This invention relates to improvements in drilling apparatus such as has been described in the Specification of my prior Application for British Letters Patent No. 12306 of 1906. The characteristic feature of the said apparatus, that is to say, the arrangement according to which the holder embraces the drill whilst its rear portion is spring mounted, is, in accordance with this invention, suitably modified to render it applicable for drilling at an angle by taking into account in the construciton of the apparatus the effect of reaction on the drill. Cf. Patent no. 12,306 (1906) submitted by same.
15,824 1906 Improvements in Dental Engines Hallam, Frederick Hyma
Hallam, Frederick Hyma, Jr.		 82 Salusbury Rd.
Kilburn, London NW		 July 12, 1906 July 11, 1907 This invention for improvements in dental engines relates to angular attachments for holding the ordinary burr-drills or other tools, and has for its object to provide an attachment whereby the drill or other tool can be held at right angles to the hand piece, or readily adjusted to an angle greater or less than a right angle, and consists in forming the hand piece with an angular extension, and in adjustably mounting an angular head on the end of said extension. Complete specification left January 11, 1907
20,034 1906 Improved Dental Instrument for Slitting and Removing Cap-crowns Dollar, Leo
Berry, Edward H.		 4922 Paschal Ave., Philadelphia, PA
1900 Patton St., Philadelphia, PA		 September 8, 1906 January 17, 1907 The object of this invention is to provide a tool by means of which cap-crowns on any tooth may be conveniently slit from the inner side, without interfering seriously with the view of the operator; and by means of which the cap-crown may be forced off the tooth after it has been slit.