Individual holder
BURTIS ERIC F
6 granted patents·152 citations·filing 1975–1979
Individually held — no corporate assignee on record.
Top patents by PatentIndex Score
6 records- 0190US4151659AMachine for teaching readingBURTIS ERIC F·Filed 1978·Granted May 1, 1979·50 cites·22 claims
- 0285USD249091SConsole for apparatus for performing mathematical functionsBURTIS ERIC F·Filed 1976·Granted Aug 22, 1978·22 cites·1 claims
- 0375US4089124AArithmetic training apparatusBURTIS ERIC F·Filed 1976·Granted May 16, 1978·23 cites·9 claims
- 0469US3947976AMathematical problem and number generating systemsBURTIS ERIC F·Filed 1975·Granted Apr 6, 1976·25 cites·8 claims
- 0567US4245405AMachine for teaching readingBURTIS ERIC F·Filed 1979·Granted Jan 20, 1981·17 cites·15 claims
- 0645US4237459AVisual display with illuminable elements arranged in vertically aligned sectionsBURTIS ERIC F·Filed 1978·Granted Dec 2, 1980·15 cites·12 claims
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Counts cover granted patents and pending applications in the PatentIndex corpus. How scoring works →