Inventor
Frank Chvojcsek
Inventor
West Dundee, IL, US
Overview
Patents· 7 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
B41Jprimary
B41JTypewriters36%
A47BTables9%
F16BDevices for fastening or securing constructional elements or machine parts together, e.g. nails, bolts, circlips, clamps, clips or wedges9%
F16MFrames, casings or beds of engines, machines or apparatus, not specific to engines, machines or apparatus provided for elsewhere9%
G06FElectric digital data processing9%
G11BInformation storage based on relative movement between record carrier and transducer9%
LOC069%
Y10TTechnical subjects covered by former us classification9%
PatentTitleYear
7,403,375'Adjustable LCD screen assembly for writing machine'2008D0554922'Stenographic tabletop'20076,736,558'Disposable ribbon cartridge for shorthand machines'20046,422,771'Disposable ribbon cartridge for shorthand machine'20025,395,178'Tripod for supporting a shorthand machine'19954,439,798'Referencing device for digital data recorders'19844,363,557'Marking device for shorthand machine'1982Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1982–2002Patents assigned to STENOGRAPH CORP (4)· patent assignee history
1982–1984Based in Chicago, IL, US· patent location history
1995Based in W. Dindee, IL, US· patent location history
2002–2008Based in West Dundee, IL, US· patent location history
2004–2008Patents assigned to STENOGRAPH L L C (2)· patent assignee history
2007Patents assigned to STENOGRAPH LLC (1)· patent assignee history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| STENOGRAPH CORP | 4 | 1982–2002 |
| STENOGRAPH L L C | 2 | 2004–2008 |
| STENOGRAPH LLC | 1 | 2007 |
Locations
| Location | Patents | Span |
|---|---|---|
| West Dundee, Illinois, US | 4 | 2002–2008 |
| Chicago, Illinois, US | 2 | 1982–1984 |
| W. Dindee, Illinois, US | 1 | 1995 |