Resources Contact Us Home
Browse by Category: Main > Construction
Class Information
Number: 144/28.7
Name: Woodworking > Special-work machine > Pencil sharpening > Movable tool > Rotatable or revolvable > Planetary
Description: Machine including means to rotate the tool on its own axis and simultaneously to revolve it about another axis through the workpiece so as to maintain it in material-removing contact with the workpiece.

Sub-classes under this class:

Class Number Class Name Patents
144/28.71 Plural tools 5

Patents under this class:

Patent Number Title Of Patent Date Issued
8505596 Cutter assembly for an electric pencil sharpener Aug. 13, 2013
7726365 Electric pencil sharpener Jun. 1, 2010
7699082 Electric multi-pencil sharpener Apr. 20, 2010
6886614 Pencil sharpener May. 3, 2005
6845795 Portable handheld sharpener with loop attachment Jan. 25, 2005
4966208 Pencil sharpener Oct. 30, 1990
4961451 Sharpener for rectangular pencils Oct. 9, 1990
4054164 Pencil sharpener Oct. 18, 1977

  Recently Added Patents
Phase-change memory device having multiple diodes
Method and system for leveraging the power of one's social-network in an online marketplace
Oscillation circuit
Power converter and method including noise suppression by controlling phase shifting of converter cells
Multi-room user interface
Signal transfer apparatus
Difference detecting apparatus, difference output apparatus, and medium
  Randomly Featured Patents
Semi-constrained artificial joint
Operator protection for high pressure hose machines
Fiber feed arrangement for friction spinning
Support for a load, especially an electric light, with a standardized vertically adjustable spring-loaded arm
Vapor emission control system for pumps
Optical pulse wave velocity obtaining apparatus and method thereof
Method for forming a corrosion-resistant conductive connector shell
Combination of bottle opener and bottle handle
Sterol esters as food additives
Training toothbrush