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| Number | Title | Issue Date |
| 8079322 | Shock tube A shock tube apparatus may include a plenum to hold a volume of gas. The plenum may include a hollow chamber having a first end and a second end located opposite one another along a longitudinal axis, the first end of the chamber defining a shock egress opening. A v... | 12/20/2011 |
| 6408614 | High-power pressure wave source High-power pressure wave source for generating pressure waves that can be repeated by igniting a combustible fluid mixture and by increasing its rate of combustion up to detonation. The high-performance pressure wave source has a channel, which expands to... | 06/25/2002 |
| 6385915 | Bird-scaring device A bird-scaring device for scaring birds without injuring the birds or without using loud noises. The bird-scaring device includes an air dispensing device. An actuator for actuating the air compressor is operationally coupled to the air compressor. A tubu... | 05/14/2002 |
| 5864517 | Pulsed combustion acoustic wave generator A pulsed combustion acoustic wave generator includes a tubular barrel having an inlet end and an open outlet end, a fuel controller for metering a controlled quantity of fuel into the inlet end of the barrel, an oxidant controller for metering a controlle... | 01/26/1999 |
| 4964331 | Airborne birdstrike prevention device A mobile, radio-controlled (RC) airplane flies around an airport in a random pattern, as controlled by an operator with a range greater than needed to scare away birds from runways. The RC airplane includes a receiver to control the launching of a special... | 10/23/1990 |
| 4745859 | Apparatus for repelling birds or beasts An apparatus for repelling birds or beasts by exploding gunpowder automatically and repeatedly to make explosive sounds. The apparatus comprises a housing, a body plate on which most of other parts of the apparatus are mounted, an electric motor, a disk-l... | 05/24/1988 |
| 4655969 | Chemiluminescent systems Chemiluminescent mixtures utilize mono and di-alkyl substituted 9,10-bis(phenylethynyl)anthracene derivatives to provide higher chemiluminescence efficiencies. The preferred fluorescers are 2-ethyl-9,10-bis(phenylethynyl)anthracene and 1,4-dimethyl-9... | 04/07/1987 |
| 4642611 | Sound engine A sound engine comprising a firing chamber, an output horn, an igniter, a valve system, an electromagnetic control device, and a source of electrical signal impulses. The igniter is mounted about the firing chamber. The valve system is arranged generally ... | 02/10/1987 |
| 4598660 | Bird scaring device A device for scaring birds thereby aiding in the prevention of crop destruction due to the birds feeding thereon comprises in combination an actuator, such as an air gun which ejects at increased velocity a gaseous stream in a predetermined path, a frame ... | 07/08/1986 |
| 4230808 | Method for making solid materials having a flash point of less than 500° C. fire alarming, fire alarming and self extinguishing, or fire alarming, self-extinguishing and fire abating Solid materials having a flash point of less than 500° C. are rendered fire alarming by providing for the presence thereon of micro capsules containing a bromofluoroalkane having a critical temperature of at least 100° C., the micro capsules having an e... | 10/28/1980 |
