1
David Steven Maitland, Billy E Thayer: Binary adder. Hewlett Packard Company, William E Hein, October 4, 1977: US04052604 (32 worldwide citation)

A binary adder employs separate summing and carry circuitry within each digit to optimize the speed of operation of the adder. Carry bits of less significant digits are calculated independently of corresponding sum bits, thus allowing propagation of such carry bits to more significant digits before ...


2
David Steven Maitland: IGFET threshold voltage compensator. Hewlett Packard Company, William E Hein, Michael L Sherrard, September 20, 1977: US04049980 (21 worldwide citation)

A circuit is described which compensates for variation in the threshold voltage of Insulated Gate Field Effect Transistors (IGFETs) in an integrated circuit by modulating the substrate voltage in response to the variation of the threshold voltage from a desired nominal value.


3
David Steven Maitland, Sandy Lee Chumbley, Havyn E Bradley: Modular binary half-adder. Hewlett Packard Company, Michael L Sherrard, October 18, 1977: US04054788 (12 worldwide citation)

Half-adder logic modules employing separate summing and carry circuitry are used in the construction of a modular binary half-adder. Carry bits of less significant digits are calculated independent of and prior to the calculation of corresponding sum bits, thus allowing rapid propagation of such car ...


4
William Donovan Eads, David Steven Maitland: Information transfer bus circuit with signal loss compensation. Hewlett Packard Company, William E Hein, August 30, 1977: US04045684 (9 worldwide citation)

An information transfer bus circuit useful in metal oxide semiconductor integrated circuits employs a network to compensate for signal losses arising from capacitance associated with gating devices in the circuit.