Inventor · disambiguated record
Johannes Bertram
Also filed as: BERTRAM JOHANNES
3 granted patents·9 citations·filing 1975–1990
59Inventor score
Top patents by PatentIndex Score
3 records- 0131US4015884ACenter-free one-row wire ball bearingHOESCH WERKE AG·Filed 1975·Granted Apr 5, 1977·7 cites·8 claims
- 0224US4863294ALarge roller bearing in the form of a wire bearingHOESCH AG·Filed 1988·Granted Sep 5, 1989·2 cites·3 claims
- 0323US5060773ASingle-action freewheel clutch with substantially large central diameterHOESCH AG·Filed 1990·Granted Oct 29, 1991·0 cites·12 claims
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