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GB9120363D0
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Helmets
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GB9017366D0
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Protective helmet with adjustable headband
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GB9016106D0
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Helmet liner
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GB8710960D0
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Aircrew helmet
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GB8628864D0
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Helmets
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GB8617950D0
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Gaseous fluid flow valves
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GB8507916D0
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Helmet
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GB8420404D0
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Retention and quick release mechanism
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GB2135866A
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Helmet with visor mechanism
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GB2015323A
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Protective helmets
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IT1093442B
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Safety helmet with adjustable visors - has guide grooves in which sliders on visor panels are movable
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GB1561660A
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Protectivehelmet
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US4199823A
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Disengageable helmet visor clamp
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DE2751988A1
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Protective helmet for aircrew - has rigid head shell with attached swivelling lens with semi-automatic clamping system
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GB1560723A
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Visor assemblies
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GB1163574A
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Helmet
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GB995665A
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Improvements in or relating to guiding mechanisms
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GB952933A
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Improvements in or relating to protective helmets
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GB720687A
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Improvements in the manufacture of helmets and like hollow articles
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US2715227A
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Helmets
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