Assignee
ZIMMERMAN D W MFG
16 granted patents·372 citations·filing 1974–1986
Top patents by PatentIndex Score
16 records- 0187US4256429AApparatus for handling signature bundlesZIMMERMAN D W MFG·Filed 1979·Granted Mar 17, 1981·42 cites·3 claims
- 0286US3933388AInterlock control system for a fluid-operated hoistZIMMERMAN D W MFG·Filed 1974·Granted Jan 20, 1976·58 cites·9 claims
- 0383US4226567AApparatus for handling bobbinsZIMMERMAN D W MFG·Filed 1978·Granted Oct 7, 1980·46 cites·14 claims
- 0479US4265147AWorking pit with articulated tool arm assemblyZIMMERMAN D W MFG·Filed 1979·Granted May 5, 1981·30 cites·18 claims
- 0573US4708574AApparatus for handling objectsZIMMERMAN D W MFG·Filed 1985·Granted Nov 24, 1987·42 cites·15 claims
- 0671US4439113ALiquid pump with flexible bladder memberZIMMERMAN D W MFG·Filed 1982·Granted Mar 27, 1984·24 cites·17 claims
- 0770US4247092AApparatus for handling a plurality of signature bundlesZIMMERMAN D W MFG·Filed 1979·Granted Jan 27, 1981·21 cites·10 claims
- 0867US4500074AFluid-operated apparatus for handling and lifting loadsZIMMERMAN D W MFG·Filed 1983·Granted Feb 19, 1985·24 cites·6 claims
- 0960US4759571AFluid transfer module with multiple flow pathsZIMMERMAN D W MFG·Filed 1986·Granted Jul 26, 1988·34 cites·14 claims
- 1058US4360320AFluid driven successive stage bladder pumpZIMMERMAN D W MFG·Filed 1980·Granted Nov 23, 1982·16 cites·12 claims
- 1155US4478390AFluid-operated apparatus for handling and lifting loadsZIMMERMAN D W MFG·Filed 1983·Granted Oct 23, 1984·13 cites·19 claims
- 1236US4478558ADownhole pump with check valveZIMMERMAN D W MFG·Filed 1982·Granted Oct 23, 1984·5 cites·5 claims
- 1336US4462571AFluid-operated, load-handling apparatusZIMMERMAN D W MFG·Filed 1982·Granted Jul 31, 1984·5 cites·14 claims
- 1435US4468175AFluid driven successive stage bladder pumpZIMMERMAN D W MFG·Filed 1982·Granted Aug 28, 1984·5 cites·33 claims
- 1527US4674959APressure-operated valve, particularly for a downhole pumpZIMMERMAN D W MFG·Filed 1985·Granted Jun 23, 1987·3 cites·22 claims
- 1624US4273499AApparatus for manipulating signature bundlesZIMMERMAN D W MFG·Filed 1979·Granted Jun 16, 1981·4 cites·8 claims
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Counts cover granted patents and pending applications in the PatentIndex corpus. How scoring works →