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Bicycle drive
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Patent number 6,244,135
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Issue date Jun 12, 2001
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Thomas Merritt
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B62 - LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
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Emissionless furnace boiler system
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Patent number 5,129,331
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Issue date Jul 14, 1992
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Thomas D. Merritt
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F25 - REFRIGERATION OR COOLING COMBINED HEATING AND REFRIGERATION SYSTEMS HEA...
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Emissionless furnace boiler system
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Patent number 5,027,720
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Issue date Jul 2, 1991
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Thomas D. Merritt
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F25 - REFRIGERATION OR COOLING COMBINED HEATING AND REFRIGERATION SYSTEMS HEA...
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Refrigerant recovery system
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Patent number 4,903,499
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Issue date Feb 27, 1990
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High Frequency Products, Inc.
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Thomas D. Merritt
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B60 - VEHICLES IN GENERAL