Assignee
COLUMBIA RIBBON CARBON MFG
23 granted patents·252 citations·filing 1972–1980
Top patents by PatentIndex Score
23 records- 0193US4077579AEdge alignment apparatusCOLUMBIA RIBBON CARBON MFG·Filed 1976·Granted Mar 7, 1978·56 cites·8 claims
- 0275US4165988ACorrection fluidCOLUMBIA RIBBON CARBON MFG·Filed 1977·Granted Aug 28, 1979·24 cites·8 claims
- 0371US4128430AMaster sheets and process for printing sameCOLUMBIA RIBBON CARBON MFG·Filed 1975·Granted Dec 5, 1978·22 cites·3 claims
- 0469US4123569ADirect ribbon inking by gravureCOLUMBIA RIBBON CARBON MFG·Filed 1977·Granted Oct 31, 1978·12 cites·7 claims
- 0569US3989569AContinuous copying methodCOLUMBIA RIBBON CARBON MFG·Filed 1975·Granted Nov 2, 1976·19 cites·5 claims
- 0668US4048952ADirect ribbon inking by gravureCOLUMBIA RIBBON CARBON MFG·Filed 1976·Granted Sep 20, 1977·12 cites·8 claims
- 0765US4042401AHectograph products and processCOLUMBIA RIBBON CARBON MFG·Filed 1975·Granted Aug 16, 1977·18 cites·9 claims
- 0856US4307149ATransfer elements and process for making sameCOLUMBIA RIBBON CARBON MFG·Filed 1979·Granted Dec 22, 1981·15 cites·15 claims
- 0948US4150187ATransfer elements and processCOLUMBIA RIBBON CARBON MFG·Filed 1975·Granted Apr 17, 1979·9 cites·6 claims
- 1048US4112178AAqueous polyurethane undercoatsCOLUMBIA RIBBON CARBON MFG·Filed 1977·Granted Sep 5, 1978·9 cites·10 claims
- 1144US4260664ATransfer elements and processCOLUMBIA RIBBON CARBON MFG·Filed 1978·Granted Apr 7, 1981·9 cites·10 claims
- 1243US4310258AInk ribbon lubrication by liquid silicone oilCOLUMBIA RIBBON CARBON MFG·Filed 1980·Granted Jan 12, 1982·5 cites·7 claims
- 1342US4092456ATransfer elements and processCOLUMBIA RIBBON CARBON MFG·Filed 1975·Granted May 30, 1978·8 cites·10 claims
- 1441US3936559APressure-sensitive transfer elementsCOLUMBIA RIBBON CARBON MFG·Filed 1973·Granted Feb 3, 1976·6 cites·6 claims
- 1539US4034843ASplit correction ribbon and methodCOLUMBIA RIBBON CARBON MFG·Filed 1975·Granted Jul 12, 1977·7 cites·10 claims
- 1637US3993832APressure-sensitive transfer element and processCOLUMBIA RIBBON CARBON MFG·Filed 1975·Granted Nov 23, 1976·4 cites·10 claims
- 1735US3937178AFilm inking systemCOLUMBIA RIBBON CARBON MFG·Filed 1972·Granted Feb 10, 1976·4 cites·7 claims
- 1834US4238549ATransfer elementsCOLUMBIA RIBBON CARBON MFG·Filed 1978·Granted Dec 9, 1980·5 cites·6 claims
- 1932US4217388APressure-sensitive transfer elements and processCOLUMBIA RIBBON CARBON MFG·Filed 1978·Granted Aug 12, 1980·4 cites·17 claims
- 2031US4087579APressure-sensitive transfer elementsCOLUMBIA RIBBON CARBON MFG·Filed 1976·Granted May 2, 1978·2 cites·7 claims
- 2127US4327127AProcess for making transfer elementsCOLUMBIA RIBBON CARBON MFG·Filed 1980·Granted Apr 27, 1982·2 cites·4 claims
- 2226US4042744AMultiple-color transfer elements and processCOLUMBIA RIBBON CARBON MFG·Filed 1973·Granted Aug 16, 1977·0 cites·11 claims
- 2320US4184003AStable hectograph compositions, transfer elements and processesCOLUMBIA RIBBON CARBON MFG·Filed 1977·Granted Jan 15, 1980·0 cites·10 claims
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