Inventor · Austin, TX, US

Douglas B. MacGregor

23Patents
13h-index
12Co-inventors
70Inventor score

Filing activity: Dec 3, 1982 → Feb 26, 1988

Most-cited inventions

PatentTitleAreaCited byStatus
US4524415A Virtual machine data processor Physics 89 Expired
US4566063A Data processor which can repeat the execution of instruction loops with minimal instruction fetches Physics 63 Expired
US4584640A Method and apparatus for a compare and swap instruction Physics 53 Expired
US4715013A Coprocessor instruction format Physics 34 Expired
US4729094A Method and apparatus for coordinating execution of an instruction by a coprocessor Physics 30 Expired
US4493035A Data processor version validation Physics 28 Expired
US4750110A Method and apparatus for executing an instruction contingent upon a condition present in another data processor Physics 26 Expired
US4731736A Method and apparatus for coordinating execution of an instruction by a selected coprocessor Physics 22 Expired
US4488228A Virtual memory data processor Physics 22 Expired
US4729093A Microcomputer which prioritizes instruction prefetch requests and data operand requests Physics 21 Expired
US4584666A Method and apparatus for signed and unsigned bounds check Physics 17 Expired
US5021991A Coprocessor instruction format Physics 16 Expired
US4763253A Microcomputer with change of flow Physics 14 Expired
US4821231A Method and apparatus for selectively evaluating an effective address for a coprocessor Physics 11 Expired
US4887203A Microcoded processor executing microroutines with a user specified starting microaddress Physics 10 Expired
US4914578A Method and apparatus for interrupting a coprocessor Physics 10 Expired
US4649477A Operand size mechanism for control simplification Physics 8 Expired
US4994961A Coprocessor instruction format Physics 6 Expired
US4758978A Method and apparatus for selectively evaluating an effective address for a coprocessor Physics 5 Expired
US4698747A Instruction address calculation unit for a microprocessor Physics 5 Expired
US4745574A Microcode testing of PLA's in a data processor Physics 5 Expired
US4744049A Microcode testing of a cache in a data processor Physics 4 Expired
US4811274A Method and apparatus for selectively evaluating an effective address for a coprocessor Physics 1 Expired

Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.