Inventor
CALANDRA JR FRANK
US36 patents
⚠️ This page may combine multiple inventors who share the name “CALANDRA JR FRANK”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
JENNMAR CORP
34 patentsUS5511909AApr 30, 1996
Cable bolt and method of use in supporting a rock formation
JENNMAR CORP68 citations96
US4861197AAug 29, 1989
Roof bolt system
JENNMAR CORP61 citations96
US5919006AJul 6, 1999
Tensionable cable bolt with mixing assembly
JENNMAR CORP57 citations95
US5078547AJan 7, 1992
Expansion assembly for mine roof bolts
JENNMAR CORP38 citations93
US6322290B1Nov 27, 2001
Cable bolt head
JENNMAR CORP27 citations92
US6146056ANov 14, 2000
Channel and bearing plate assembly
JENNMAR CORP20 citations92
US6056482AMay 2, 2000
Cable bolt head
JENNMAR CORP25 citations92
US5954455ASep 21, 1999
Combination bolt system
JENNMAR CORP36 citations92
USRE35902ESep 22, 1998
Bearing plate
JENNMAR CORP21 citations92
US5762451AJun 9, 1998
Multi-piece, split bail expansion anchor
JENNMAR CORP22 citations92
US5314268AMay 24, 1994
Non-metallic reinforcing rod and method of use in supporting a rock formation
JENNMAR CORP33 citations92
US5292209AMar 8, 1994
Bearing plate
JENNMAR CORP22 citations92
US5244314ASep 14, 1993
Expansion assembly
JENNMAR CORP48 citations92
US4934873AJun 19, 1990
Mine roof support utilizing roof anchors having eye-bolt heads
JENNMAR CORP39 citations92
US4678374AJul 7, 1987
Roof bolt with expansion shell and threaded nut
JENNMAR CORP33 citations92
US4518292AMay 21, 1985
Method and apparatus for combining resin bonding and mechanical anchoring of a bolt in a rock formation
JENNMAR CORP52 citations92
US4516885AMay 14, 1985
Method and apparatus for combining resin bonding and mechanical anchoring of a bolt in a rock formation
JENNMAR CORP46 citations92
US4419805ADec 13, 1983
Method for combining resin bonding and mechanical anchoring of a bolt in a rock formation
JENNMAR CORP51 citations92
US4413930ANov 8, 1983
Method and apparatus for combining resin bonding and mechanical anchoring of a bolt in a rock formation
JENNMAR CORP49 citations92
US5785463AJul 28, 1998
Combination cable bolt system
JENNMAR CORP32 citations91
US5064312ANov 12, 1991
Delay stopper for a mine roof anchor and method of manufacture thereof
JENNMAR CORP32 citations90
US5385433AJan 31, 1995
Bearing plate
JENNMAR CORP25 citations89
US6599059B2Jul 29, 2003
Three-prong shell
JENNMAR CORP23 citations87
US5445477AAug 29, 1995
Bearing plate with a continuous elliptical embossment
JENNMAR CORP20 citations84
US4784531ANov 15, 1988
Bendable roof bolt without notch
JENNMAR CORP20 citations82
US5302056AApr 12, 1994
Method and apparatus for supporting a mine roof
JENNMAR CORP16 citations81
US6619888B2Sep 16, 2003
Flange nut for mine roof bolt
JENNMAR CORP19 citations80
US5425601AJun 20, 1995
Longwall mining roof control system
JENNMAR CORP15 citations74
US7284933B2Oct 23, 2007
Square embossed roof and rib plate
JENNMAR CORP9 citations72
US5184923AFeb 9, 1993
Expansion shell assembly
JENNMAR CORP12 citations71
US4969778ANov 13, 1990
Expansion assembly for mine roof bolts utilized in small diameter bore holes
JENNMAR CORP19 citations71
US4904123AFeb 27, 1990
Expansion assembly for mine roof bolts utilized in small diameter bore holes
JENNMAR CORP19 citations71
US5450663ASep 19, 1995
Method for fabricating a truss member for a mine roof support
JENNMAR CORP2 citations62
US5851481ADec 22, 1998
Rebar with vanadium alloy
JENNMAR CORP4 citations56