Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Browse by Category: Main > Engineering
Class Information
Number: 405/301
Name: Hydraulic and earth engineering > Earth treatment or control > Shoring, bracing, or cave-in prevention > Roof support > Jack > Mobile > Self-advanceable > Paired > Nested
Description: Method or apparatus wherein one prop consists of two laterally spaced rigidly connected sections with the other prop received therebetween.










Patents under this class:

Patent Number Title Of Patent Date Issued
7540693 Method for pillar recovery in chamber-and-pillar working and tubbing unit for pillar recovery Jun. 2, 2009
6910834 Mine prop Jun. 28, 2005
4420278 Heading shield Dec. 13, 1983
4073151 Mine roof support assemblies Feb. 14, 1978











 
 
  Recently Added Patents
Apparatus and method to reduce noise in magnetic resonance imaging systems
Systems and methods for detailed error reporting in data storage systems
Device and method for superimposing patterns on images in real time, particularly for guidance by location
5-HT.sub.3 receptor modulators, methods of making, and use thereof
Automated synchronization of design features in disparate code components using type differencing
System and method for testing an integrated circuit embedded in a system on a chip
Method and apparatus for allocating and obtaining IP address
  Randomly Featured Patents
HSK spindle tension testing kit
High frequency scan converter
Safety interlock between a vacuum interrupter and a disconnect switch
Apparatus for threshing legumes
Headset with microphone
System and method for managing fiber-to-the-curb network elements
Camera lens cap clip
Optical coordinate data entry device with integral lens and spacer
Cosmetic stick compositions containing DI--and triblock copolymers
Method for enhancing printing quality