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SPRUNG PHILIP D

Overview
  • Total Patents
    21
About

SPRUNG PHILIP D has a total of 21 patent applications. Its first patent ever was published in 1977. It filed its patents most often in United States, Canada and Germany. Its main competitors in its focus markets environmental technology, agriculture and civil engineering are QIN CHUNMING, ROB INTERNAT PTY LTD and MOISIO ESKO VELI HEIKKI.

Patent filings in countries

World map showing SPRUNG PHILIP Ds patent filings in countries
# Country Total Patents
#1 United States 11
#2 Canada 6
#3 Germany 2
#4 Sweden 2

Patent filings per year

Chart showing SPRUNG PHILIP Ds patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 Sprung Philip D 21

Latest patents

Publication Filing date Title
US4956936A Method and system for purification of water for greenhouse structures
US4996791A Method and structure for improved natural lighting for plant growth
US4982527A Seedling propagation assembly
CA1317762C Method and structure for improved natural lighting for plant growth
US4830276A Heater system for greenhouses
US4833825A System for supporting growing plants
US5001859A Method and structure for environmental control of plant growth
US4800674A Greenhouse structure
US4788791A Cooling system for greenhouse structures
US4770347A Aeration assembly for a nutrient feed solution for a nutrient film propagation system for plants
DE2844152A1 Building stressed membrane enclosing structure - by power jack tensioning fabric strips on transverse arch frames with slide pads
DE2844151A1 Building structure including frame members and stressed membrane cover - has frame members of I=beam section extruded aluminium alloy with attached fabric capturing device
SE7810524L Constructions
SE7810525L A space enclosed by a membrane which has been tensioned over a carrying construction
US4118904A Building structure
US4137687A Stressed membrane space enclosure
CA1059871A Stressed membrane space enclosure
CA1059872A Building structure