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 [Search a list of Patent Appplications for class 89]   CLASS 89,ORDNANCE
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SECTION I - CLASS DEFINITION

This class includes all guns adapted to be mounted or supported otherwise than by hand, all explosion-operated guns including hand and shoulder firearms, bomb dropping devices, and those gun combinations and subcombinations which are not provided for in other classes including mounts, supports, carriages, loading and hoisting mechanisms, shields.

SECTION II - REFERENCES TO OTHER CLASSES

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42, Firearms,   appropriate subclassesfor all hand and shoulder firearms, except explosion-operated.
60, Power Plants,   subclasses 632 through 638for one shot explosion-actuated expansible chamber-type motors.
86, Ammunition and Explosive-Charge Making,   for pertinent subclass(es) as determined by schedule review.
102, Ammunition and Explosives,   appropriate subclassesfor gun projectiles, per se.
124, Mechanical Guns and Projectors,   appropriate subclassesfor devices for throwing or projecting missiles by mechanical means. This includes pneumatic and centrifugal projecting devices.
175, Boring or Penetrating the Earth,   subclasses 2 through 4.6for a process or means for penetrating the earth by means of a below-ground explosion and including a device for firing a bullet or shaped charge to penetrate the earth formation or perforate a casing or other wall member in the bore.
181, Acoustics,   subclass 223 for gun silencers, per se.
434, Education and Demonstration,   subclasses 11 through 27for apparatus and processes for teaching and demonstrating the art of war, including gunnery.
505, Superconductor Technology: Apparatus, Material, Process,   subclasses 150 through 239for high temperature (Tc greater than 30 K) superconducting systems or devices, particularly subclass 164 for projectile or launching device or system.

SUBCLASSES

[List of Patents for class 89 subclass 1.1]    1.1MISCELLANEOUS:
 This subclass is indented under the class definition.  Subject matter not otherwise classifiable.

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42, Firearms,   appropriate subclassesfor all hand shoulder firearms, except explosion-operated.
73, Measuring and Testing,   subclass 167 for ordnance and projectile measuring and testing.
102, Ammunition and Explosives,   appropriate subclassesfor gun projectiles, per se.
124, Mechanical Guns and Projectors,   appropriate subclassesfor devices for throwing or projecting missiles by mechanical means. This includes pneumatic and centrifugal projecting devices.
235, Registers,   subclasses 400 through 418for ordnance and weapon system calculators.
346, Recorders,   subclass 38 for ordnance responsive recorders.
D12, Transportation,   subclass 12 for the design of tanks and armored cars.
D22, Arms, Pyrotechnics, Hunting and Fishing Equipment,   subclasses 100 , for projectile launching weapon; 103, for rifle or shotgun; 104, for pistol.
  
[List of Patents for class 89 subclass 1.11]    1.11WAGING WAR:
 This subclass is indented under the class definition.  Subject matter relating to conducting wars between nations and states, to tactics employed by a military, police, or like unit, or individual to the detriment of an adversary.

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239, Fluid Sprinkling, Spraying, and Diffusing,   appropriate subclassesfor water cannon.
431, Combustion,   subclass 91 for a flame thrower.
  
[List of Patents for class 89 subclass 1.12]    1.12GUN HEATERS:
 This subclass is indented under the class definition.  Subject matter for heating the mechanisms of guns.
  
[List of Patents for class 89 subclass 1.13]    1.13MINE-DESTROYING DEVICES:
 This subclass is indented under the class definition.  Subject matter for clearing mine fields.

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102, Ammunition and Explosives,   subclass 403 for the use of explosives to clear mine field.
  
[List of Patents for class 89 subclass 1.14]    1.14EXPLOSIVE-OPERATED APPARATUS (E.G., EXPLOSIVE DOOR HINGE, TOOL EXPLOSIVELY ACTUATED, BAND RELEASE, EXPANSION OF TUBE, CABLE CUTTER, EXPLOSIVELY OPERATED SPLITTING WEDGES):
 This subclass is indented under the class definition.  Subject matter operated by means of an explosive agent.
(1) Note. The subject matter of this subclass is a subcombination for a combination classified elsewhere.

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114, Ships,   subclass 221 for explosive-operated underwater cable cutters.
137, Fluid Handling,   subclass 68.13 for explosive frangible valves.
227, Elongated-Member-Driving Apparatus,   subclasses 9 through 11for stud guns.
244, Aeronautics and Astronautics,   subclass 121 for explosive means permitting rapid egress from an aircraft.
264, Plastic and Nonmetallic Article Shaping or Treating: Processes,   subclass 84 for applying an explosive force to make an article.
  
[List of Patents for class 89 subclass 1.15]    1.15WELL PERFORATORS:
 This subclass is indented under the class definition.  Subject matter used to make a hole in a well pipe and/or the surrounding bore.

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166, Wells,   subclasses 55 through 55.8,63, and 297 for perforating well pipes.
175, Boring or Penetrating the Earth,   subclasses 2 through 4.6for a process or means for penetrating the earth by means of a below ground explosion and including a device for firing a bullet or shaped charge to penetrate the earth formation or perforate a casing or other wall member in the bore.
  
[List of Patents for class 89 subclass 1.151]    1.151Method of making:
 This subclass is indented under subclass 1.15.  Subject matter includes a step of fabricating an explosion-operated device used to make a hole in a well pipe and/or the surrounding bore.
  
[List of Patents for class 89 subclass 1.16]    1.16ENGINE STARTERS:
 This subclass is indented under the class definition.  Subject matter generating the motive power to begin the operation of an engine.

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60, Power Plants,   subclasses 786 through 790where combustion products are used as motive fluid combined with a starting feature.
123, Internal-Combustion Engines,   subclass 183.1 for gunpowder engine starters.
  
[List of Patents for class 89 subclass 1.2]    1.2SMOKE OR RESIDUE EJECTOR:
 This subclass is indented under the class definition.  Subject matter for removing the products of combustion resulting from the firing of a piece of ordnance.
  
[List of Patents for class 89 subclass 1.25]    1.25LUBRICANT INJECTOR:
 This subclass is indented under the class definition.  Subject matter for applying lubricant to cartridges while being fed into a gun or for applying lubricant to the gun.

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184, Lubrication,   appropriate subclassesfor general utility lubricators not classified elsewhere.
  
[List of Patents for class 89 subclass 1.3]    1.3MUZZLE LOADING:
 This subclass is indented under the class definition.  Subject matter which can be loaded only from the forward end of the gun barrel from which the fired bullet emerges.
(1) Note. Mortars and ordnance wherein the projectile surrounds the barrel are common here.

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45,for loading other than by the muzzle.
  
[List of Patents for class 89 subclass 1.34]    1.34LINE THROWING:
 This subclass is indented under the class definition.  Subject matter for projecting cord, rope, wire, string, steel tape, cable etc.
  
[List of Patents for class 89 subclass 1.35]    1.35TRENCH MORTARS:
 This subclass is indented under the class definition.  Subject matter comprising high angle of fire ordnance (greater than 45°) having a relatively short barrel that fires a relatively small shell (85 mm or less).
  
[List of Patents for class 89 subclass 1.4]    1.4CHARGING MECHANISMS FOR GUNS:
 This subclass is indented under the class definition.  Subject matter for opening the breech block of an automatic gun to introduce the first round into the chamber and mechanisms opening the breech block of an automatic gun to extract and eject a misfire.
  
[List of Patents for class 89 subclass 1.41]    1.41MULTIPLE BARREL GUNS:
 This subclass is indented under the class definition.  Subject matter having a plurality of tubes through which projectiles are expelled.
  
[List of Patents for class 89 subclass 1.42]    1.42GUN HANDLES:
 This subclass is indented under the class definition.  Subject matter comprising that part of a piece of ordnance which is to be held, turned, lifted, pulled, etc., with the hand.
  
[List of Patents for class 89 subclass 1.51]    1.51BOMB, FLARE AND SIGNAL DROPPING:
 This subclass is indented under the class definition.  Subject matter for holding and releasing bombs, flares and signals from aircraft.

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60, Power Plants,   subclasses 632 through 638for one shot explosion-actuated expansible chamber-type motors.
74, Machine Element or Mechanism,   subclass 2 for miscellaneous trip device.
102, Ammunition and Explosives,   subclasses 382 through 397for drop bombs, per se, and subclasses 337-340 for parachute flares.
221, Article Dispensing,   appropriate subclasses for article dispensers not otherwise provided for.
235, Registers,   subclasses 401 and 402 for calculators which determine the point at which bombs should be dropped.
244, Aeronautics and Astronautics,   subclass 137.3 for aerial cargo unloading by parachute extraction.
340, Communications: Electrical,   subclasses 825.67 and 825.72 for devices and apparatus designed to be controlled by radio energy transmitted from a distance.
398, Optical Communications,   subclasses 106 through 114for devices and apparatus designed to be controlled by radiant energy (i.e., light) transmitted from a distance.
  
[List of Patents for class 89 subclass 1.52]    1.52Drop grenade:
 This subclass is indented under subclass 1.51.  Subject matter which are released manually out of an aircraft.
(1) Note. The grenades are designed to be dropped by hand from the aircraft.
  
[List of Patents for class 89 subclass 1.53]    1.53Sway braces:
 This subclass is indented under subclass 1.51.  Subject matter where the ordnance to be dropped is supported from pylons on the wings of an aircraft and there are supports to prevent vibration of the bomb, flare or signal.
  
[List of Patents for class 89 subclass 1.54]    1.54Bomb displaced from exterior of plane:
 This subclass is indented under subclass 1.51.  Subject matter where the ordnance is carried on the outside of an aircraft until it is released.
  
[List of Patents for class 89 subclass 1.55]    1.55Arming devices:
 This subclass is indented under subclass 1.51.  Subject matter where the ordnance is not operable to explode until activated so that it will explode at a desired time.
  
[List of Patents for class 89 subclass 1.56]    1.56Electrical and radio releases and sighting:
 This subclass is indented under subclass 1.51.  Subject matter where the ordnance is aimed and is dropped by means of an electrical device, or by means using an electromagnetic radio wave.
  
[List of Patents for class 89 subclass 1.57]    1.57Explosive releases:
 This subclass is indented under subclass 1.51.  Subject matter where the ordnance to be dropped is separated from the aircraft by means of an explosion.
  
[List of Patents for class 89 subclass 1.58]    1.58Shackles:
 This subclass is indented under subclass 1.51.  Subject matter where the ordnance to be dropped is held in a rack in the interior of the aircraft by means of a cable, chain, or wire.
  
[List of Patents for class 89 subclass 1.59]    1.59Racks:
 This subclass is indented under subclass 1.51.  Subject matter comprising a magazine for holding ordnance to be dropped within the interior of the aircraft.
  
[List of Patents for class 89 subclass 1.6]    1.6Timing devices:
 This subclass is indented under subclass 1.51.  Subject matter where the ordnance to be dropped contains a clock so that it will detonate at a desired moment.
  
[List of Patents for class 89 subclass 1.61]    1.61Sighting:
 This subclass is indented under subclass 1.51.  Subject matter having a nonelectric means to aim the ordnance.

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1.56,for electrical means to aim the ordnance.
  
[List of Patents for class 89 subclass 1.7]    1.7RECOILLESS GUN:
 This subclass is indented under the class definition.  A gun comprising means to project a projectile and employing an explodable propellant which produces a pressurized gas upon detonation thereof and having (1) a barrel means through which the projectile may be propelled to be ejected through an opening therein by the force of the gas, and (2) means to substantially neutralize, with respect to the gun, those propellant gas reaction forces which are developed and which act counter to the gas forces which act in a direction to propel the projectile.
  
[List of Patents for class 89 subclass 1.701]    1.701Having a reaction mass:
 This subclass is indented under subclass 1.7.  A gun comprising an expansible chamber associated with the barrel means and having at least one movable wall formed by a freely movable reaction mass means which may be accelerated by those forces in the pressurized gas which are developed counter to those forces therein which propel the projectile.
(1) Note. The expansible chamber may be a second barrel means arranged to cooperate with the gun-barrel means, and the reaction mass may be in the form of a second projectile means adapted to be projected from the gun by the forces in the pressurized gas which act counter to those which act to propel the first projectile.
  
[List of Patents for class 89 subclass 1.702]    1.702Barrel parts separable for loading:
 This subclass is indented under subclass 1.701.  A gun in which the barrel means comprises barrel portions which are secured in end-to-end relationship and which are at least partially separated to facilitate the loading of the projectile, the propellant, or the reaction mass.
  
[List of Patents for class 89 subclass 1.703]    1.703Having pressure-control means:
 This subclass is indented under subclass 1.7.  A gun in which the means to neutralize the pressurized gas reaction forces comprises adjustable means to vent the said gas to the ambient, whereby to selectively control the gas reaction force.
  
[List of Patents for class 89 subclass 1.704]    1.704Having breech closure:
 This subclass is indented under subclass 1.7.  A gun having a closure means with which to close, either in whole or in part, an opening in the breech of the gun through which an explosive charge is inserted.

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17,for breech closures having locking means which hold the closure in the breech of the gun.
  
[List of Patents for class 89 subclass 1.705]    1.705Closure has firing device:
 This subclass is indented under subclass 1.704.  A gun in which the closure means is provided with a means to detonate the explosive means.
  
[List of Patents for class 89 subclass 1.706]    1.706Cartridge-case closure:
 This subclass is indented under subclass 1.704.  A gun in which the closure means for said opening comprises a cartridge.
  
[List of Patents for class 89 subclass 1.8]    1.8ROCKET LAUNCHING:
 This subclass is indented under the class definition.  Subject matter relating to the launching of a rocket.
(1) Note. For the purpose of this definition a rocket is defined as a vehicle, which may or may not be specifically described, having therein a reaction motor and a propellant, whereby, independent of atmospheric oxygen, propulsion gas may be produced by a chemical reaction. However, in the case where the rocket, before being launched is located entirely or partially under water, and during launching, or soon thereafter, a part or all of the rocket contacts the water, the rocket propulsion gas, or any other pressurized fluid employed to launch the rocket, may be produced by a chemical reaction or by a nonchemical-reaction means.
(2) Note. The word launch means to cause to be moved for disengagement from a supporting environment either (a) by the thrust created by the reaction motor of the rocket being launched alone or (b) by an additional propelling force and the thrust of the reaction motor of the rocket.
(3) Note. Subject matter under this definition includes transport, storage, connector, latch, ejecting, exhaust gas deflecting structures or the like for a rocket which are in combination with either the rocket or launcher for a launching purpose and which are not classified elsewhere.
(4) Note. To be classified under this definition in the case of a rocket not launched under water, as defined in (1) Note, at least a portion of the propulsion gases emitted by the rocket whether generated outside the rocket or in the rocket are required to be produced by a chemical reaction.
(5) Note. For original classification of a patent under this definition, rather than in other appropriate subclasses of Class 89, the sole disclosed use or a claim thereof must be for launching a rocket.

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33.01through 35.02, for devices which hold or feed a plurality of cartridges to a gun.
37.01through 44.02, for gun mounts in general.
45through 47, for means for placing a load into firing position in a gun.
125,for automatic gun structures which could be utilized in the launching of rockets.

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102, Ammunition and Explosives,   subclasses 347 through 352for rocket support sticks and other supports for pyrotechnic rockets wherein the supports are integral with the rocket and are launched therewith.
104, Railways,   subclasses 48 through 50for rail transfer structure and subclasses 89-95 for suspended rail structures, per se.
114, Ships,   subclasses 18 through 19and 316-320 for vessels having means for launching a torpedo.
124, Mechanical Guns and Projectors,   appropriate subclassesfor apparatus employing nonexplosive means to impel or launch a projectile wherein the projectile is disclosed as having a chemical reaction motor which is claimed in name only. Patents are also classified in Class 124 which claim significant projectile structure having a propelling agent which is either produced by a nonchemical reaction or is a stored pressurized fluid. However, the combination of a projectile (regardless of its propulsion means) with a launching platform submerged in a liquid is classified in Class 89, subclasses1.8-1.82.
198, Conveyors: Power-Driven,   appropriate subclassesfor power driven conveyor devices, per se.
200, Electricity: Circuit Makers and Breakers,   appropriate subclassesfor electrical switch devices which interrupt the flow of electricity but which normally remain connected in the electrical circuit.
206, Special Receptacle or Package,   subclass 317 for a container for a weapon.
244, Aeronautics and Astronautics,   subclasses 2 through 3, for means to launch and lift an aircraft, and subclass 63 for devices and arrangements adapted to assist in the take off of aircraft from land or water. Launching devices disclosed as rocket launchers wherein the rocket is claimed in name only are classified in Class 244. Also, launchable devices comprising propeller blades and flight control surfaces disclosed as a stage of a rocket-launching means are classified in Class 244.
361, Electricity: Electrical Systems and Devices,   subclasses 248 through 252for electrical arc or spark means for igniting a fuel by which a rocket may be propelled.
414, Material or Article Handling,   appropriate subclassesfor rocket handling structures which do not provide means for the launching of the rocket.
439, Electrical Connectors,   appropriate subclassesfor details of electrical connections which permit making and breaking of an electrical circuit by physical separation of conductors.
446, Amusement Devices: Toys,   subclass 212 for reaction propulsion toy launchers having nonchemical reaction propulsion devices.
  
[List of Patents for class 89 subclass 1.801]    1.801Having rocket-storage and transfer means:
 This subclass is indented under subclass 1.8.  Subject matter having a rocket-storage means for storing or holding a rocket in a position where it is not connected to a launching means from which it is to be launched, and a means for engaging and transferring said rocket from said storage means to a point so that it may be launched from the rocket-launching means.

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1.815,for rocket launchers which support a rocket in a nonfiring or storage position and then move the rocket to a firing position.
  
[List of Patents for class 89 subclass 1.802]    1.802Launcher movable relative to storage means:
 This subclass is indented under subclass 1.801.  Subject matter wherein the launching means is supported so that it may be moved relative to the rocket-storage means.
  
[List of Patents for class 89 subclass 1.803]    1.803Having magazine-gate means to feed and support rocket for launching:
 This subclass is indented under subclass 1.801.  Subject matter wherein the storage means is provided with an opening and a means cooperating with said opening which both constitutes a gate or closure for said opening and a means to transfer a rocket from the storage means to a position from which it may be launched.
  
[List of Patents for class 89 subclass 1.804]    1.804Storage means movable to facilitate launching:
 This subclass is indented under subclass 1.801.  Subject matter in which the storage means is movable from a first position to a second position for facilitating transfer of the rocket from the storage means to the launcher.
  
[List of Patents for class 89 subclass 1.805]    1.805Having means to transfer rocket to launcher:
 This subclass is indented under subclass 1.8.  Apparatus having means for transferring a rocket to be launched from a position removed from the launcher to a position on the launcher.
  
[List of Patents for class 89 subclass 1.806]    1.806Having means restraining rocket from movement in launching direction:
 This subclass is indented under subclass 1.8.  Apparatus comprising a rocket-launching means for restraining the rocket from movement thereon at least in a direction in which it is to be launched.

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1.812,for other means designed to prevent a rocket from being fixed or launched prematurely.
  
[List of Patents for class 89 subclass 1.807]    1.807Including rocket-firing means:
 This subclass is indented under subclass 1.806.  Apparatus having means by which the rocket motor may be started.

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1.813+,for a rocket launcher having a rocket- firing means.
  
[List of Patents for class 89 subclass 1.808]    1.808Rocket spin stabilized while restrained:
 This subclass is indented under subclass 1.806.  Apparatus having means to rotate a rocket on the launcher prior to release thereof so as to stabilize the rocket while in flight.
  
[List of Patents for class 89 subclass 1.809]    1.809Underwater launching:
 This subclass is indented under subclass 1.8.  Subject matter wherein a rocket before being launched is located entirely or partially underwater, and during launching or soon thereafter, a part or all of the rocket contacts the water and wherein the rocket propulsion gas, or any other pressurized fluid employed to launch the rocket, may be produced by a chemical reaction or by a nonchemical-reaction means.
  
[List of Patents for class 89 subclass 1.81]    1.81Rocket launched from container:
 This subclass is indented under subclass 1.809.  Subject matter having a container for enclosing a rocket to keep water from contacting it until contact is desired.
  
[List of Patents for class 89 subclass 1.811]    1.811Having umbilical-separating means:
 This subclass is indented under subclass 1.8.  Apparatus having cable or conduit means connected to a rocket by connecting means with means actuated upon the launching of the rocket to permit or cause separation of said connecting means to disconnect said cable or conduit means from said rocket.
(1) Note. A mere snap or manually actuated means connecting a service conduit or cable to a rocket whether in launching position or not is not included in this subclass but is classified, per se, in Class 200, Electricity: Circuit Makers and Breakers, appropriate subclasses, or Class 439, Electrical Connectors, appropriate subclasses. This subclass includes only those cable or conduit connecting means which are separated or conditioned for separation as a result of launching a rocket.
  
[List of Patents for class 89 subclass 1.812]    1.812Having safety devices for preventing premature ignition or launching:
 This subclass is indented under subclass 1.8.  Apparatus having means which prevents premature starting of a rocket motor or launching of the rocket vehicle.

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1.806,for means which physically engages a rocket for preventing movement thereof from a position on a launcher from which it is launched.
  
[List of Patents for class 89 subclass 1.813]    1.813Having rocket-firing means:
 This subclass is indented under subclass 1.8.  Apparatus having means by which a rocket motor may be started.
  
[List of Patents for class 89 subclass 1.814]    1.814Rocket propellant ignited by electrical means:
 This subclass is indented under subclass 1.813.  Apparatus wherein the rocket motor propellant is ignited by electrical means.
  
[List of Patents for class 89 subclass 1.815]    1.815Movable launcher:
 This subclass is indented under subclass 1.8.  Apparatus having rocket launchers which support and hold a rocket in a nonfiring or storage position and then move the rocket to a firing position.
(1) Note. Excluded from this subclass are those launchers rigidly mounted on a vehicle (e.g., jeep, aircraft, etc.) wherein movement of the launcher is due only to the movement of the vehicle.

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1.802,for a movable rocket launcher having means storing a rocket in a position disconnected from said launcher and means to transfer the rocket to the launcher.
  
[List of Patents for class 89 subclass 1.816]    1.816Having tubular guide means:
 This subclass is indented under subclass 1.8.  Apparatus wherein the rocket launcher is provided with guide means in the form of a tube or barrel means to guide a rocket being launched.
  
[List of Patents for class 89 subclass 1.817]    1.817Including a forward closure:
 This subclass is indented under subclass 1.816.  Apparatus comprising means to close the end of the guide means through which a rocket may pass when it is launched.
  
[List of Patents for class 89 subclass 1.818]    1.818Including an auxiliary rocket-launching charge:
 This subclass is indented under subclass 1.816.  Apparatus including a propulsion charge in the guide means for producing propulsion gases to aid in the launching of a rocket from the guide means.
  
[List of Patents for class 89 subclass 1.819]    1.819Having guide means:
 This subclass is indented under subclass 1.8.  Apparatus wherein the rocket launcher is provided with means to guide a rocket being launched.
  
[List of Patents for class 89 subclass 1.82]    1.82Method of making:
 This subclass is indented under subclass 1.8.  Subject matter includes fabricating a mount used to hold a projectile having a propulsion system.
  
[List of Patents for class 89 subclass 4.05]    4.05EXPLOSION OPENED BREECH:
 This subclass is indented under the class definition.  Subject matter which utilize the force of an explosion to open the breech of a gun and eject a cartridge shell if present.
(1) Note. A new charge inserted by hand or by nonexplosion-operated means usually releases the breech-block which may then be closed.
(2) Note. If a new cartridge or charge is positioned by means operated by the explosion so that a new cycle of operation can be initiated merely by causing or permitting the charge to be fired, the gun is considered to be "automatic" and will be classified in subclasses 125-199. For further definition of "automatic" and "explosion-operated means", see the definition and notes of subclass 125.

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9through 13.1, for nonautomatic machine guns.
17through 26, for breech closures.
27.11through 28.2, for firing devices.
37.01through 44.02, for gun mounts.
45through 47, for loading and ramming devices handling single charges or cartridges.
125through 199, for automatic guns and see (2) Note above.

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42, Firearms,   appropriate subclassesfor firearms having no explosion-operated features.
60, Power Plants,   subclasses 632 through 638, for one shot explosion-actuated expansible chamber-type motors.
  
[List of Patents for class 89 subclass 4.1]    4.1Rotary breech block:
 This subclass is indented under subclass 4.05.  Subject matter where the force of the explosion opens a closure which rotates about the axis of the gun barrel to close or open the breech.
  
[List of Patents for class 89 subclass 4.2]    4.2Transverse sliding breech block:
 This subclass is indented under subclass 4.05.  Subject matter where the explosion opens a closure which moves along an axis at an angle with respect to the gun barrel.
  
[List of Patents for class 89 subclass 4.5]    4.5Blow back breech block:
 This subclass is indented under subclass 4.05.  Guns having blow back (unlocked) breech blocks.

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194,for automatic guns of blow back type.
  
[List of Patents for class 89 subclass 5]    5SUBMARINE:
 This subclass is indented under the class definition.  Guns adapted to be employed under water, usually for discharging torpedoes.
  
[List of Patents for class 89 subclass 6]    6FUSE SETTERS:
 This subclass is indented under the class definition.  Apparatus for operating upon encased fuses of explosive devices for adjusting them to determine operating time, corresponding processes and combinations having such subject matter as a part thereof.