Individual holder
SIWULA JOHN T
5 granted patents·151 citations·filing 1978–1981
Individually held — no corporate assignee on record.
Top patents by PatentIndex Score
5 records- 0184US4478413ATorsion type exercise deviceSIWULA JOHN T·Filed 1980·Granted Oct 23, 1984·76 cites·5 claims
- 0276USD274179SCombined electronic calculator and checkbookSIWULA JOHN T·Filed 1981·Granted Jun 5, 1984·16 cites·1 claims
- 0371US4222109AElectronic checkbookSIWULA JOHN T·Filed 1978·Granted Sep 9, 1980·27 cites·10 claims
- 0461US4308588AElectronic checkbookSIWULA JOHN T·Filed 1980·Granted Dec 29, 1981·24 cites·5 claims
- 0541US4290708AAttachable microprocessorsSIWULA JOHN T·Filed 1978·Granted Sep 22, 1981·8 cites·5 claims
Join the waitlist — get patent alerts
Get an alert when SIWULA JOHN T files or is granted a new patent.
We store only your email — no account needed. See our privacy policy.
Counts cover granted patents and pending applications in the PatentIndex corpus. How scoring works →