Inventor · disambiguated record
John C. Hamma
Also filed as: HAMMA JOHN · HAMMA JOHN C · POPIEL STANLEY
27 granted patents·737 citations·filing 1978–2000
97Inventor score
Files withGRADCO/DENDOKI INC12PITNEY BOWES INC2ACCENT COLOR SCIENCES INC1BELL & HOWELL CO1DRESSER INC1
Top patents by PatentIndex Score
27 records- 0196US5508818AMixed mail transportSCAN CODE INC·Filed 1994·Granted Apr 16, 1996·151 cites·19 claims
- 0295US4332377ACompact sorterGRADCO DENDOKI INC·Filed 1981·Granted Jun 1, 1982·57 cites·4 claims
- 0391US4328963ACompact sorterGRADCO DENDOKI INC·Filed 1979·Granted May 11, 1982·39 cites·16 claims
- 0490US4466608AMovable tray sheet sorterGRADCO SYSTEMS INC·Filed 1982·Granted Aug 21, 1984·37 cites·12 claims
- 0586US5793397APrinter assemblyACCENT COLOR SCIENCES INC·Filed 1995·Granted Aug 11, 1998·80 cites·53 claims
- 0685US5503388ABuffered stackerBELL & HOWELL CO·Filed 1994·Granted Apr 2, 1996·33 cites·12 claims
- 0778US5311625APortable, integrated, universally adjustable position control systemTRUMAN PRODUCTS·Filed 1992·Granted May 17, 1994·58 cites·33 claims
- 0877US5577278APortable, integrated, universally adjustable position control systemPRINCETON PRODUCTS INC·Filed 1994·Granted Nov 26, 1996·50 cites·20 claims
- 0974US6119525APressure gauge having dampener mechanismDRESSER IND·Filed 1998·Granted Sep 19, 2000·34 cites·18 claims
- 1074US5675959AOpening fingers for envelope inserting apparatusPITNEY BOWES INC·Filed 1996·Granted Oct 14, 1997·36 cites·5 claims
- 1172US5457636APostal finishing kioskPITNEY BOWES INC·Filed 1993·Granted Oct 10, 1995·37 cites·11 claims
- 1271US4300710AContinuous form feederGRADCO DENDOKI INC·Filed 1979·Granted Nov 17, 1981·19 cites·12 claims
- 1367US4186837AAutomated film cartridge and mailer sorting and correlating apparatusMYSTIC COLOR LAB INC·Filed 1978·Granted Feb 5, 1980·11 cites·35 claims
- 1465US6651507B1Pressure gauge having a dampener mechanismDRESSER INC·Filed 2000·Granted Nov 25, 2003·13 cites·19 claims
- 1565USD271882SUniversal sorterGRADCO/DENDOKI INC·Filed 1980·Granted Dec 20, 1983·9 cites·1 claims
- 1664US5615995AMail piece stacking machineFiled 1995·Granted Apr 1, 1997·16 cites·16 claims
- 1760US4397461ASorting machineGRADCO DENDOKI INC·Filed 1981·Granted Aug 9, 1983·12 cites·10 claims
- 1852USD270253SCombined copying and sorting machineGRADCO/DENDOKI INC·Filed 1981·Granted Aug 23, 1983·5 cites·1 claims
- 1949US5248960ASignal generating/position controlling systemHAMMA JOHN·Filed 1992·Granted Sep 28, 1993·25 cites·13 claims
- 2044USD271775SCopying and sorting apparatusGRADCO/DENDOKI INC·Filed 1981·Granted Dec 13, 1983·3 cites·1 claims
- 2140USD264220SCopying and sorting apparatusGRADCO/DENDOKI INC·Filed 1980·Granted May 4, 1982·2 cites·1 claims
- 2240USD263848SCopying and sorting apparatusGRADCO/DENDOKI INC·Filed 1980·Granted Apr 13, 1982·2 cites·1 claims
- 2337US5507380AStacked package separating systemFiled 1994·Granted Apr 16, 1996·6 cites·8 claims
- 2431USD264092SContinuous form feeding and copying apparatusGRADCO/DENDOKI INC·Filed 1980·Granted Apr 27, 1982·0 cites·1 claims
- 2531USD263850SContinuous form feeding and copying apparatusGRADCO/DENDOKI INC·Filed 1980·Granted Apr 13, 1982·0 cites·1 claims
- 2630US5438874APressure measuring instrumentsFiled 1994·Granted Aug 8, 1995·2 cites·18 claims
- 2730USD265564SContinuous form feeding and copying apparatusGRADCO/DENDOKI INC·Filed 1980·Granted Jul 27, 1982·0 cites·1 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →