James D. Ralph
163Patents
87h-index
16Co-inventors
87Inventor score
Filing activity: Apr 13, 1995 → Aug 11, 2015
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5607426A | Threaded polyaxial locking screw plate assembly | Human Necessities | 673 | Expired |
| US5520690A | Anterior spinal polyaxial locking screw plate assembly | Human Necessities | 671 | Expired |
| US5876402A | Anterior spinal polyaxial locking screw plate assembly having recessed retaining rings | Human Necessities | 643 | Expired |
| US5669911A | Polyaxial pedicle screw | Human Necessities | 639 | Expired |
| US5690630A | Polyaxial pedicle screw | Human Necessities | 604 | Expired |
| US5882350A | Polyaxial pedicle screw having a threaded and tapered compression locking mechanism | Human Necessities | 584 | Expired |
| US5713904A | Selectively expandable sacral fixation screw-sleeve device | Human Necessities | 563 | Expired |
| US5800435A | Modular spinal plate for use with modular polyaxial locking pedicle screws | Human Necessities | 514 | Expired |
| US5733286A | Rod securing polyaxial locking screw and coupling element assembly | Human Necessities | 507 | Expired |
| US5817094A | Polyaxial locking screw and coupling element | Human Necessities | 493 | Expired |
| US5554157A | Rod securing polyaxial locking screw and coupling element assembly | Human Necessities | 458 | Expired |
| US5586984A | Polyaxial locking screw and coupling element assembly for use with rod fixation apparatus | Human Necessities | 458 | Expired |
| US5647873A | Bicentric polyaxial locking screw and coupling element | Human Necessities | 457 | Expired |
| US5989291A | Intervertebral spacer device | Human Necessities | 453 | Expired |
| US5584834A | Polyaxial locking screw and coupling element assembly for use with side loading rod fixation apparatus | Human Necessities | 449 | Expired |
| USRE37665E1 | Polyaxial pedicle screw having a threaded and tapered compression locking mechanism | General | 442 | Expired |
| US5667508A | Unitary locking cap for use with a pedicle screw | Human Necessities | 437 | Expired |
| US5725528A | Modular polyaxial locking pedicle screw | Human Necessities | 429 | Expired |
| US5549608A | Advanced polyaxial locking screw and coupling element device for use with rod fixation apparatus | Human Necessities | 422 | Expired |
| US5531746A | Posterior spinal polyaxial locking lateral mass screw plate assembly | Human Necessities | 420 | Expired |
| US6558387B2 | Porous interbody fusion device having integrated polyaxial locking interference screws | Human Necessities | 408 | Expired |
| US6451021B1 | Polyaxial pedicle screw having a rotating locking element | Human Necessities | 397 | Expired |
| US5752957A | Polyaxial mechanism for use with orthopaedic implant devices | Human Necessities | 385 | Expired |
| US5609593A | Advanced polyaxial locking hook and coupling element device for use with top loading rod fixation devices | Human Necessities | 358 | Expired |
| US6468310B1 | Intervertebral spacer device having a wave washer force restoring element | Human Necessities | 323 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.