1
Martin Stephen J: Remote meter reader system. Hunter Electronics, June 26, 1973: US3742142 (68 worldwide citation)

A method and apparatus by which a repeating event type meter, such as kilowatt hour meters as used by power companies, traffic counters as used by cities and counties, fuel meters showing number of gallons used, and other similar devices can be interconnected to a telemetering unit, and by remote co ...


2
Worsham Robert, Martin Stephen J: Emergency Radio Warning System. Criminalistics, O Brien Anthony A, February 4, 1975: US3864674 (24 worldwide citation)

A radio warning system includes emergency condition sensors for actuating respective radio transmitters which are modulated by identification generators to produce identification signals which contain one or more frequencies selected from groups of four frequencies in accordance with selected identi ...


3
Martin Stephen J: Pulse interrogation article-sorting system. January 23, 1973: US3713102 (19 worldwide citation)

A pulse interrogation article-sorting system for identifying and directing articles along a distribution network, such as passenger baggage along a conveyor therefor at an airline terminal. A particular form of the article-sorting system for airline baggage includes a conveyor having both a collecti ...


4
Martin Stephen J: Automatic security system. Robertshaw Controls Company, May 9, 1972: US3662112 (9 worldwide citation)

An automatic security system for use with public telephone facilities to centrally monitor various alarm events occurring at any one of a plurality of remote locations. The system includes a central monitoring complex having a number of operator stations connected to a local public telephone exchang ...


5
Martin Stephen J: Determination of hydrocarbons in rock samples. Ruska Petroleum Lab, January 8, 1986: GB2161269-A (5 worldwide citation)

A method of determining quantitatively and qualitatively the hydrocarbons present in a sample in which the sample is pyrolyzed, the off stream split into two with one stream analyzed for total hydrocarbons present and the other stream passed through traps to separate the oil range hydrocarbons from ...


6
Martin Stephen J: Sonic article-sorting system. Spott Electrical Company, May 30, 1972: US3666094 (4 worldwide citation)

A sonic article-sorting system for processing passenger baggage at an airline terminal. A particular form of the system includes a conveyor having both a collection section along which baggage is accumulated and a distribution section providing a plurality of distribution branches or stations respec ...


7
Martin Stephen J: Alarm coupler. Robertshaw Controls Company, February 6, 1973: US3715502 (3 worldwide citation)

A solid-state coupler for transferring a telephone line from conventional house phones to automatic dialing apparatus upon the occurrence of an alarm includes a main transfer relay, a dialing relay adapted to be controlled by the automatic dialing apparatus, a start hang-up timer for opening the tel ...


8
Martin Stephen J: Negative impedance line isolators. January 18, 1972: US3636266 (2 worldwide citation)

Bidirectional, symmetrical negative impedance transmission line isolators having a high-impedance midpoint junction between a plurality of transistors for providing high-impedance isolation and enabling interconnection of any desired number of such circuits to form a telephone system conferencing ne ...


9
Martin Stephen J: Shunt negative impedance amplifier. O Brien Anthony A, August 13, 1974: US3829625

A transmission line isolation and amplifier circuit is disclosed having a negative impedance line isolator and an amplifier with a common input/output port therebetween. First and second resistive networks are connected for biasing a transistor amplifier to provide a current gain which is converted ...


10
Spence Lewis C, Martin Stephen J: Continuous wave carrier signals distance measuring system and method.. Spence Lewis C, August 24, 1983: EP0086189-A1

A radio frequency distance measuring system and method employs at least one pair of continuous wave carrier signals having a preselected frequency separation equal to a desired difference frequency. The pair of continuous wave carrier signals are generated at the transmitting station by transmitters ...