Home › Gradco/Dendoki › R. Clark DuBois

RD

R. Clark DuBois — 30 Patents

GRGradco/Dendoki: 11 patents #2 of 4Top 50%

GSGradco Systems: 3 patents #2 of 7Top 30%

UNUnknown: 1 patents #29,356 of 83,584Top 40%

Fairfield, CT: #18 of 661 inventorsTop 3%

Connecticut: #1,127 of 34,797 inventorsTop 4%

Overall (All Time): #121,623 of 4,157,543Top 3%

30 Patents All Time

R. Clark DuBois has been granted 30 US patents while listed as an inventor at Gradco/Dendoki. The first was granted in 1980 and the most recent in May 2008. R. Clark DuBois ranks #121,623 of 4,157,543 US inventors in our database (top 2.9%). Patent records list R. Clark DuBois in Fairfield, CT, US.

Patents per Year

Issued Patents All Time

Showing 1–25 of 30 patents

Patent #	Title	Co-Inventors	Date	Approx Value ⓘ
7370432	Tape measure with detachable tape	—	2008-05-13
5131644	Sorter and receiving tray	—	1992-07-21
5078377	Document feeder	—	1992-01-07
5022639	Document feeder with improved recyclable document control	—	1991-06-11
4936563	Document feeder with improved adjustable support control panels	—	1990-06-26
4925175	Apparatus for feeding sheets to a copying machine	—	1990-05-15
4702466	Sheet material feeder for copiers and other sheet processing apparatus	—	1987-10-27
4688783	Bottom feed sheet feeding apparatus	—	1987-08-25
4674735	Automatic sheet feeder for copiers and other machines having sheet transport mechanisms and assemblies therewith	Robert K. Streeter, Jr.	1987-06-23
4674738	Stop-mechanism for document copier	—	1987-06-23
4632376	Drive mechanism for document copier	—	1986-12-30
4560156	Device for drop-feeding sheet material into a printing apparatus or the like	—	1985-12-24
4526361	Document turnover device	—	1985-07-02
4522519	Apparatus and process for drop-feeding sheets to a typing or printing machine including separable paper clamping trays	—	1985-06-11
4515053	Continuous web feeder with web cutting means	—	1985-05-07
4500087	Drop tray sorter	—	1985-02-19	$391,000
4478406	Apparatus for sorting photocopies	—	1984-10-23	$256,000
4466608	Movable tray sheet sorter	John C. Hamma	1984-08-21	$167,000
D271882	Universal sorter	John C. Hamma	1983-12-20
D271775	Copying and sorting apparatus	John C. Hamma	1983-12-13
D270253	Combined copying and sorting machine	John C. Hamma	1983-08-23
4397461	Sorting machine	John C. Hamma	1983-08-09
D265564	Continuous form feeding and copying apparatus	John C. Hamma	1982-07-27
4332377	Compact sorter	John C. Hamma	1982-06-01
4328963	Compact sorter	John C. Hamma	1982-05-11