Patent assignee · US · COMPANY

Altera Corporation

4,299Patents

2,765Active

4,299Granted

60Portfolio score

Filing activity: May 3, 1984 → May 21, 2024 · 1,108 expiring within 5 years

Most-cited patents

Patent	Title	Area	Cited by	Status
US5260611A	Programmable logic array having local and long distance conductors	Electricity	445	Expired
US5260610A	Programmable logic element interconnections for programmable logic array integrated circuits	Electricity	420	Expired
US6943579B1	Variable fixed multipliers using memory blocks	Physics	409	Expired
US7996749B2	Signal loss detector for high-speed serial interface of a programmable logic device	Electricity	409	Active
US8533245B1	Multipliers with a reduced number of memory blocks	Physics	402	Active
US5689195A	Programmable logic array integrated circuit devices	Electricity	391	Expired
US4609986A	Programmable logic array device using EPROM technology	Electricity	386	Expired
US4871930A	Programmable logic device with array blocks connected via programmable interconnect	Electricity	378	Expired
US4617479A	Programmable logic array device using EPROM technology	Electricity	343	Expired
US5983277A	Work group computing for electronic design automation	Emerging Cross-Sectional Technologies	303	Expired
US5550782A	Programmable logic array integrated circuits	Physics	303	Expired
US5537057A	Programmable logic array device with grouped logic regions and three types of conductors	Electricity	280	Expired
US5371422A	Programmable logic device having multiplexers and demultiplexers randomly connected to global conductors for interconnections between logic elements	Electricity	269	Expired
US4912342A	Programmable logic device with array blocks with programmable clocking	Electricity	268	Expired
US6215326A	Programmable logic device architecture with super-regions having logic regions and a memory region	Electricity	263	Expired
US5121006A	Registered logic macrocell with product term allocation and adjacent product term stealing	Electricity	255	Expired
US6538470B1	Devices and methods with programmable logic and digital signal processing regions	Physics	254	Expired
US4899067A	Programmable logic devices with spare circuits for use in replacing defective circuits	Electricity	251	Expired
US4677318A	Programmable logic storage element for programmable logic devices	Electricity	250	Expired
US4713792A	Programmable macrocell using eprom or eeprom transistors for architecture control in programmable logic circuits	Electricity	246	Expired
US5258668A	Programmable logic array integrated circuits with cascade connections between logic modules	Electricity	242	Expired
US5815726A	Coarse-grained look-up table architecture	Electricity	233	Expired
US5111423A	Programmable interface for computer system peripheral circuit card	Physics	232	Expired
US5970255A	System for coupling programmable logic device to external circuitry which selects a logic standard and uses buffers to modify output and input signals accordingly	Electricity	224	Expired
US5572148A	Programmable logic array integrated circuit with general-purpose memory configurable as a random access or FIFO memory	Electricity	224	Expired

Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.