Bizarre Patents
Mountable Printable Placard With Headband
A resilient headband in a shape for being mounted on the head of the user. The headband is equipped with a longitudinal slotted member for holding a placard.
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| Number | Title | Issue Date |
| 5894821 | Air valve system combined with a distribution chamber According to the invention, the valve comprises a cylindrical body (21) in a housing (21), for receiving one end of a return spring while the end is in contact with the case. The valve also includes two ribs (22, 23) for connection to a sealing plate (25)... | 04/20/1999 |
| 5479894 | Two-stroke internal combustion engine In a two-stroke internal combustion engine with an engine block including a crankcase and a cylinder housing receiving pistons which are connected to a crankshaft by crosshead rods with crossheads guided for linear movement with the piston and a connectin... | 01/02/1996 |
| 5421293 | Port-controlled two-stroke internal combustion engine In a port-controlled two-stroke internal combustion engine with an engine block comprising a crankcase and a cylinder block including pistons connected to a crankshaft by crosshead rods with crossheads guided for linear movement with the pistons, and conn... | 06/06/1995 |
| 4185597 | Self-supercharging dual piston engine apparatus Internal combustion engine apparatus includes a dual piston with a plurality of intake ports having reed type check valves.... | 01/29/1980 |
| 4115037 | Opposed piston internal combustion engine-driven pump An engine driven reciprocating air compressor. The engine is operated in a through scavenge two-stroke mode. The engine has opposed pistons reciprocating in opposition in a cylinder, the pistons being rigidly connected to respective compressor pistons wor... | 09/19/1978 |
