What follows are the subclasses from one class of the Manual of Classification for US patents. As you scroll through the list and encounter a class/subclass of interest, you can jump back to the top and retrieve patent titles by entering the class/subclass in the box below.
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Class Number: 440 Class Title: MARINE PROPULSION Subclass Subclass Number Title 1 MEANS TO CONTROL THE SUPPLY OF ENERGY RESPONSIVE TO A SENSED CONDITION 2 WITH INDICATOR 3 DIVERSE ENGINE MEANS 4 PLURAL ENGINES WITH SINGLE PROPELLING MEANS 5 HYDRAULIC FLUID DRIVE FOR PROPELLING MEANS 6 ELECTRIC DRIVE FOR PROPELLING MEANS 7 .With foot control 8 WIND DRIVEN MOTORS 9 WAVE POWERED PROPELLING MEANS 10 .By oscillating weight 11 POWERED FROM LAND VEHICLE SUPPORTED BY VESSEL 12 .Land vehicle is two-wheel type 13 OSCILLATING PROPELLING MEANS 14 .Fishtail motion propelling means 15 ..Flexible 16 .Moving wave propeller 17 .Having nonpropelling cycle segment 18 ..Piston and cylinder 19 ..With means to move propelling element to nonpropelling position 20 ..With reversing means 21 OPERATOR POWERED DRIVE FOR PROPELLING MEANS 22 .Rocking watercraft 23 .Fluid pump 24 .Having reciprocating pull cable 25 .Sliding handle or pedal 26 .Rotary cranking arm 27 ..Plural-crank type 28 ..Having flexible drive shaft 29 ..Having endless drive member 30 ...Chain and sprocket 31 ..Including gear means 32 .Lever with connecting linkage 33 TOWING 34 .Cable system 35 .Track system 36 .Ground wheel or poler 37 AIR PROPELLED BOAT 38 JET DRIVE 39 .Auxiliary use of propulsive fluid 40 .Direction control for fluid jet 41 ..With bucket or clamshell-type reversing means 42 ..Pivoted outlet 43 ..Pivoted vane 44 .Propulsion fluid is pressurized gas 45 ..Produced by combustion 46 .Having means to prevent clogging 47 .Having means to increase fluid drive means efficiency 48 HELICAL SCREW 49 SCREW PROPELLER 50 .Variable pitchh 51 .Combined with rudder 52 .With vibration dampening 53 .With means effecting or facilitating movement of propulsion unit or a segment of the propulsion unit (e.g., tilting or steering) 54 ..With means limited to vertical movement within hull cavity 55 ..Having restraining means 56 ...With releasing means when propulsion unit hits obstruction 57 ..Having gimbal or universal joint support 58 ..Having toothed or threaded member to move propulsion unit or a segment of the propulsion unit 59 ...Screw type 60 ...Rack and pinion 61 ..Having fluid motor to move propulsion unit or a segment of the propulsion unit 62 ..Having pliant member to move propulsion unit or a segment of the propulsion unit 63 ..Having link or lever to move propulsion unit or a segment of the propulsion unit 64 ..Having shaft with releasable coupling 65 ..With means to lift propeller when an obstruction is hit 66 .Having means to control flow around propeller 67 ..Nozzle (Kort-Type) 68 ..Hull channel 69 ...With open bottom 70 ..Hull concavity 71 .Propeller guard 72 ..Cage or screen 73 .Self-clearing 74 .Shaft braking or locking 75 .Having transmission 76 .Propulsion unit casing 77 ..Cowl 78 ..Propeller shaft housing 79 .Propeller arrangement 80 ..Tandem 81 ...On single shaft 82 ..Supporting strut 83 .Shafting 84 ENGINE, MOTOR, OR TRANSMISSION CONTROL MEANS 85 .For starter means 86 .For transmission 87 .For engine speed 88 MEANS FOR HANDLING ENGINE FLUIDS 89 .Exhaust gas handling means 90 PADDLE WHEEL 91 .Having means to reposition paddle wheel assembly 92 .Having means to retract paddle or change paddle attitude 93 ..Having means to provide cyclic change of paddle attitude (e.g., Voith Schneider) 94 UPRIGHT REMAINING ORBITING PADDLES 95 FLEXIBLE ENDLESS PROPELLING MEANS 96 .With paddle 97 ..Foldable or retractable to nonpropelling position 98 BUOYANT PROPELLING MEANS 99 .Rotating outer hull 100 .Wheellike 101 OAR OR PADDLEE 102 .Articulated sectional oar or paddle 103 ..Having gear 104 .Support 105 ..Having outrigger 106 ..Oarlock 107 ...Having oar shaft restraining means 108 ...Separate mounting means 109 ....Socket type 110 ..Having guard for oar 111 INBOARD ENGINE MOUNT 112 .Having thru-hull sealing means 113 MISCELLANEOUS * ****************************** * CROSS-REFERENCE ART COLLECTION * ****************************** 900 OUTBOARD MOTORS AND OUTDRIVES