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Class Information
Number: 244/31
Name: Aeronautics > Aircraft, lighter-than-air > Balloons
Description: Aircraft sustained by their buoyancy relative to the air, having no provision for propulsion.

Sub-classes under this class:

Class Number Class Name Patents
244/33 Captive 110
244/32 With parachutes 8

Patents under this class:
1 2 3 4

Patent Number Title Of Patent Date Issued
4174082 Solar powered hot air balloon Nov. 13, 1979
4172048 Mixture suitable for an aerostat Oct. 23, 1979
4113206 Lighter-than-air apparatus and method of utilizing same Sep. 12, 1978
4090682 Pressure and hot air relief vents for a pressurized hot air airship May. 23, 1978
4084771 Hot air aerostat Apr. 18, 1978
4077588 Permanently buoyant balloon Mar. 7, 1978
4032086 Aerostats and aquastats Jun. 28, 1977
4026499 Glass balloons and method for making same May. 31, 1977
3993269 Toroidal tail structure for tethered aeroform balloon Nov. 23, 1976
3945591 Hot air balloons Mar. 23, 1976
3941384 Balloon carried basket for ball game Mar. 2, 1976

1 2 3 4

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