Inventor · disambiguated record
Gerhard Ritzerfeld
Also filed as: RITZERFELD GERHARD
15 granted patents·88 citations·filing 1973–1977
91Inventor score
Files withRITZERFELD GERHARD15
Top patents by PatentIndex Score
15 records- 0184US4009954AElectrostatic copierRITZERFELD GERHARD·Filed 1975·Granted Mar 1, 1977·15 cites·24 claims
- 0280US4102267AFeeding of sheets and cards in a rotary duplicator machine capable of whole-page and linewise printingRITZERFELD GERHARD·Filed 1977·Granted Jul 25, 1978·24 cites·10 claims
- 0374US4068948ACopying apparatusRITZERFELD GERHARD·Filed 1976·Granted Jan 17, 1978·9 cites·10 claims
- 0462US4129073ADuplicator machine with means for applying to the copies different markingsRITZERFELD GERHARD·Filed 1977·Granted Dec 12, 1978·10 cites·29 claims
- 0548US3942440AMethod of making a printing formRITZERFELD GERHARD·Filed 1973·Granted Mar 9, 1976·9 cites·38 claims
- 0642US4026646AElectrostatic or xerographic copying or duplicating machineRITZERFELD GERHARD·Filed 1976·Granted May 31, 1977·2 cites·30 claims
- 0741US4354757AXerographic or electrostatic copying apparatus capable of copying only selected lines, paragraphs or other such sections of an originalRITZERFELD GERHARD·Filed 1976·Granted Oct 19, 1982·4 cites·1 claims
- 0841US4002117ARotary copying machineRITZERFELD GERHARD·Filed 1975·Granted Jan 11, 1977·6 cites·7 claims
- 0935US4057348ACopying apparatusRITZERFELD GERHARD·Filed 1975·Granted Nov 8, 1977·1 cites·19 claims
- 1035US4037531ARotary printing machineRITZERFELD GERHARD·Filed 1975·Granted Jul 26, 1977·4 cites·4 claims
- 1130US4009956AElectrostatic or xerographic copying or duplicating machine with built-in arrangement for cutting a sheet along a selected line or linesRITZERFELD GERHARD·Filed 1975·Granted Mar 1, 1977·2 cites·5 claims
- 1230US3962489ACopy sheet and method of printing the sameRITZERFELD GERHARD·Filed 1974·Granted Jun 8, 1976·2 cites·5 claims
- 1329US4029413ACopier with means for handling components of form letters, and the likeRITZERFELD GERHARD·Filed 1975·Granted Jun 14, 1977·0 cites·19 claims
- 1428US4069757AProgrammed operation of rotary duplicator machine capable of whole-page, paragraphwise and linewise printing upon whole-page sheets and smaller-format cards or slipsRITZERFELD GERHARD·Filed 1977·Granted Jan 24, 1978·0 cites·12 claims
- 1528US3995546ARotary duplicating machineRITZERFELD GERHARD·Filed 1975·Granted Dec 7, 1976·0 cites·4 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →