Individual holder
GRAHAM ERWIN W
4 granted patents·70 citations·filing 1979–1986
Individually held — no corporate assignee on record.
Top patents by PatentIndex Score
4 records- 0154US4784122APortable cervical traction device using constant force springsGRAHAM ERWIN W·Filed 1986·Granted Nov 15, 1988·30 cites·8 claims
- 0250US4593684AOccipital support for cervical tractionGRAHAM ERWIN W·Filed 1984·Granted Jun 10, 1986·23 cites·15 claims
- 0339US4283857ASpindle-height gage and method of calibrationGRAHAM ERWIN W·Filed 1979·Granted Aug 18, 1981·6 cites·11 claims
- 0436US4606333APortable cervical spine traction deviceGRAHAM ERWIN W·Filed 1984·Granted Aug 19, 1986·11 cites·19 claims
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Counts cover granted patents and pending applications in the PatentIndex corpus. How scoring works →