The Patent Finder

Csignum Ltd.

Also on record
Records under this name other than the patents Csignum Ltd. holds now: patents now held by others, patents whose terms have ended, and its applications, pending or abandoned. None of them is counted in the 8 patents it holds.

Back to Csignum Ltd.

PatentTitleStatus Expires Confidence
US 11,750,300Mobile device underwater communications system and method
Term ended
Term ended Jul 15, 2026 · From the USPTO record
Term endedTerm ended Jul 15, 2026From the USPTO record
US 7,877,059Underwater communications system comprising relay transceiver
Term ended
Term ended Jun 15, 2026 · From the USPTO record
Term endedTerm ended Jun 15, 2026From the USPTO record
US 8,045,919Electromagnetic/acoustic underwater communications system
Term ended
Term ended Jun 15, 2026 · From the USPTO record
Term endedTerm ended Jun 15, 2026From the USPTO record
US 8,326,219Communications system
Term ended
Ended no later than Jun 15, 2026 · From the USPTO record
Term endedEnded no later than Jun 15, 2026From the USPTO record
US 8,331,856Underwater camera communication system
Term ended
Ended no later than Jun 15, 2026 · From the USPTO record
Term endedEnded no later than Jun 15, 2026From the USPTO record
US 8,346,164Underwater communication system
Term ended
Ended no later than Jun 15, 2026 · From the USPTO record
Term endedEnded no later than Jun 15, 2026From the USPTO record
US 8,346,165Diver audio communication system
Term ended
Ended no later than Jun 15, 2026 · From the USPTO record
Term endedEnded no later than Jun 15, 2026From the USPTO record
US 8,358,973Communications system
Term ended
Ended no later than Jun 15, 2026 · From the USPTO record
Term endedEnded no later than Jun 15, 2026From the USPTO record
US 8,682,244Underwater communication system
Term ended
Ended no later than Jun 15, 2026 · From the USPTO record
Term endedEnded no later than Jun 15, 2026From the USPTO record
US 9,270,387Mobile device with an underwater communications system and method
Term ended
Ended no later than Jun 15, 2026 · From the USPTO record
Term endedEnded no later than Jun 15, 2026From the USPTO record
10 of 19 patents shown.
Pro members see all 19.
Pro members: see all 19 patents
The Patent Finder CompaniesExpirationsCalculatorWatchlistPricing MethodologyCorrectionsLegalPrivacysupport@thepatentfinder.com Updated Nov 14, 2026 · includes USPTO assignment & status data published Nov 14, 2026 and grant & fee data published Nov 10, 2026 (weekly) Part of 137 Finder · © 2026 137 Finder LLC · Sources cited